Question 4 (1 point)
In an endothermic reaction products are
than reactants
in potential energy and ___stable
higher more

Answers

Answer 1

In an endothermic reaction products are HIGHER than reactants in potential energy and LESS stable.

Explanation:

Energy is input into the reaction in an endothermic reaction. This means the products are of a higher energy level than the reactants. Therefore the reaction increases Gibb's free energy and reduces entropy. Remember in thermodynamic stability involves an increase in entropy and a decrease in Gibbs free energy. Therefore the products are less stable than the reactants. This is why endothermic reactions do not occur spontaneously like exothermic reactions.


Related Questions

The reaction for the decomposition of ammonia can be written as shown below. If a student starts with 21.7 g of ammonia how many grams of hydrogen gas will be produced by the reactions?Why

2NH3 = N2 + 3H2

A. 1.28g
B. 2.55g
C. 3.85g
D. 32.5g

Answers

Answer:

Option C. 3.85g

Explanation:

2NH3 <=> N2 + 3H2

Molar Mass of NH3 = 14.0067+ (3x1.0078) = 14.0067 + 3.02352 = 17.03022g/mol

Mass of NH3 from the balanced equation = 2 x 17.03022 = 34.06044g

Molar Mass of H2 = 2x1.00784 = 2.01568g/mol

Mass of H2 from the balanced equation = 3 x 2.01568 = 6.04704g

From the equation,

34.06044g of NH3 produced 6.04704g of H2

Therefore, 21.7 of NH3 will produce = (21.7 x 6.04704)/34.06044 = 3.85g of H2

a helium balloon contains 0.46g off helium. how many moles of helium does it contain?

Answers

(0.48 gram) x (1mole / 4.0 gram) = 0.48/4.0 = 0.12 mole

Mole measure the number of elementary entities of a given substance that are present in a given sample. The mole of helium gas is 0.115 mole.

What is mole?

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number. Mole is inversely proportional to the molar mass of a substance and directly proportional to the given mass of that substance.

Mathematically,

mole of helium gas =given mass of helium ÷ molar mass of helium gas

Molar mass of helium=4 g/mol

Mass of helium =  0.46g

Substituting the values in above formula we get

Mole of helium gas  =  0.46g÷ 4 g/mol

Mole of helium gas  = 0.115 mole

Therefore, the mole of helium gas is 0.115 mole.

To know more about mole, here:

https://brainly.com/question/15209553

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A ball has a volume of 5.27 liters and is at a temperature of 27.0°C. A pressure gauge attached to the ball reads 0.25 atmosphere. The atmospheric pressure is 1.00 atmosphere.
Calculate the absolute pressure inside the ball and the amount of air it contains.
The absolute pressure inside the ball is ??? atmospheres
The ball contains ???mole of air

Answers

The absolute pressure inside the ball is 1.25atm.

Explanation:

Given-

Volume, V = 5..27L

Temperature, T = 27°C

Gauge Pressure, Pg = 0.25 atm

Atmospheric pressure, Patm = 1 atm

Absolute pressure, Pabs = ?

We know,

[tex]Pabs = Pg + Patm\\\\\\Pabs = 0.25 + 1 atm\\\\Pabs = 1.25atm[/tex]

Therefore, absolute pressure inside the ball is 1.25atm.

Answer:

The absolute pressure inside the ball is 1.25 atmospheres.

The ball contains 0.267 mole of air.

Explanation:

im typing this to trick the algorithm but yeah that's right lol

Please show full working out 50 points :)

Answers

Answer:

The answer is-2168kj/mol

Explanation:

Formula is product-reactant

Product is B2O3+3H2O

B2O3=-1274kj/mol

3H2O=3(-286)=-858kj/mol

Reactant is B2H6

B2H6=36kj/mol

Product-reactant=-858-1274-36

=-2168kj/mol

Answer:

first you subtract then you divide the equation an the you get your ansewe

Explanation:

01:44:44
If a gas is moved from a large container to a small container but its temperature and number of moles remain the same, what
would happen to the pressure of the gas?
O
It would increase.
It would be halved.
It would stay the same
It would slightly decrease
Mark this and retum
Save and Exit

Answers

The pressure of the gas would increase.

Explanation:

Using the ideal gas formulae we can evaluate this fact;

P₁V₁/T₁ = P₂V₂/T₂

We can assume that the volume is reduced by half (the T₁ and T₂ will cancel out because they remain constant);

P₁V₁ = P₂ * 0.5V₁

P₁V₁/0.5V₁ = P₂

P₁/0.5 = P₂

You can observe that the pressure will also increase – diving a number by a fraction or decimal number increases the resultant value. In this case, the pressure will increase by 2 fold

which changes can reach dynamic equilibrium
A- nuclear only
B- chemical only
C- nuclear and physical
D - chemical and physical

Answers

Answer:

D - chemical and physical

Explanation:

Only chemical and physical changes can reach the level of dynamic equilibrium. Nuclear reactions cannot reach dynamic equilibrium.

A system is in dynamic equilibrium when the rate of forward reaction is the same as that of backward reaction in a reversible reaction. Nuclear reactions cannot be reversed. Dynamic equilibrium is prominent in chemical reactions. It is commonly found that as a reaction occurs, the backward and forward reactions can reach equilibrium levels. In physical changes, this can also occur when certain conditions of pressure and temperatures are satisfied.

There are many different natural resources found in Florida. Florida's climate is warm
and humid with an abundance of solar energy. The state is surrounded by ocean
water and has fertile soil great for farming fruits and vegetables. Half of Florida sana
is covered by trees, ideal for wildlife habitats and the production of paper products.
Florida has a rich source of mineral deposits including: limestone, phosphate and
silicon deposits. Florida is also a source of natural gas and oil.
Which of the following is a nonrenewable resource found in the State of Florida?

Answers

C. Phosphate is the non renewable resource found in the state of Florida.

Explanation:

There are so many things made from the non renewable resource, phosphate found in the state of Florida.

It is used in the large scale preparation of fertilizers, that is supplied to the world wide farmers and small amount of the phosphate is  utilized to manufacture some of the supplements like soft drinks, tooth paste and vitamins.

Both gas and oil are  also non-renewable, since it takes an ample amount of time  to regenerate.

a chemist measured 75.00g of HCL into a volumetric flask and added water until the volume was 1.000 L. what is the molarity of the resulting hydrochloric acid solution?

Answers

Answer: M = 2.08 M

Explanation: Molarity is expressed as the number of moles per unit volume in liters. First convert the mass of HCl to moles using its molar mass. Then substitute the variables to the formula for molarity.

75.00 g HCl x 1 mole HCl / 36 g HCl

= 2.08 moles HCl

For Molarity.

M = n / L

= 2.08 moles HCl / 1.000 L

= 2.08 M

A change in state is a physical change.

True or false​

Answers

Answer: Depending on the state of change it can be a physical change. Example: Evaporation is the physical change of a liquid turned into a gas.

That said, I'm pretty sure the answer is (True)

Note: Hope this is correct and it helps. Good luck :)

For an element such as sodium, how many ionization energies are there?

Answers

Answer:

Sodium has 496KJ/mol ionization energy.

Explanation:

Ionization energy is the process in which electron which is present in the outermost shell is removed with the absorption of energy by the electron. Different atoms have different ionization energies. When we go from left to the right in the periodic table, ionization energy increases due to atomic size decrease. When we go from top to bottom in the periodic table, ionization energies decreases due to increase the atomic size. Sodium has 496KJ/mol ionization energy which means the outermost electron needs 496KJ/mol energy for removal.

Final answer:

Sodium, with atomic number 11, has 11 ionization energies, each corresponding to one of its 11 electrons. The first ionization energy involves removing the loosely held valence electron, resulting in the formation of a sodium ion (Na+). Each subsequent ionization energy is higher due to greater electrostatic attraction after each electron removal.

Explanation:

For an element such as sodium, the number of ionization energies corresponds to the number of electrons an atom has, which is 11 for sodium. Each removal of an electron from an atom requires more energy than the last due to the increased electrostatic attraction between the remaining electrons and the nucleus. This means for sodium there are 11 ionization energies, each removal corresponding to one of sodium's electrons - starting with the outermost electron, which is in the 3s orbital.

The first ionization energy is typically the smallest because it involves removing the most loosely held electron. As you proceed to remove more electrons, the ion becomes more positively charged and the remaining electrons are more strongly attracted to the nucleus. Hence, each successive ionization energy is greater than the previous one, often with a significant jump observed when starting to remove core electrons that are closer to the nucleus and more tightly bound.

The alkali metal sodium, with atomic number 11, has an electronic configuration of [Ne]3s¹. This 3s electron is the valence electron and is the easiest to remove. Once this electron is removed, sodium becomes a sodium ion (Na+) with a +1 charge.

Compare heat vs. temperature

Answers

Answer:

See the answer beloew, please.

Explanation:

The concepts of heat and temperature are related, but they are not the same. Temperature refers to a physical quantity which indicates the amount of heat. The latter corresponds to the energy that moves from one body to another, thus being able to raise or lower the temperature.

Final answer:

Heat refers to the transfer of thermal energy, measured in joules, while temperature measures the kinetic energy of particles, observed via a thermometer. Temperature influences chemistry by affecting states of matter and reaction rates.

Explanation:

Many often confuse heat with temperature, yet they refer to different aspects of thermal energy. Temperature is a measure of the average kinetic energy of the particles in a substance and is what we measure with a thermometer. On the other hand, heat is the transfer of thermal energy due to a temperature difference between objects. It is a form of energy flow from a warmer object to a cooler one and is measured in joules or calories. A high temperature might make us feel 'hot', but it is the flow of heat to or from our bodies that we truly sense.

Temperature plays a critical role in chemistry; it affects the state of matter and the rate of chemical reactions. For instance, when ice turns into water, it is because of an increase in temperature. Similarly, many chemical reactions speed up with higher temperatures, and keeping unstable materials like enzymes at lower temperatures can prolong their stability.

A reaction will occur when CaCl2 is combined with _______. A) F2 B) N2 C) Br2 D) I2

Answers

Answer:

A reaction will occur when CaCl2 is combined with F2.

Explanation:

Let us know the terms at first.

Ca- Calcium

Cl2- Chloride, therefore CaCl2 is Ca+ Cl2 and that is calcium chloride.

Now, F2 is fluorine which is a yellow compressed gas.

When CaCl2 combines with F2, it gives out products like CaF2 or calcium fluoride, which is a white crystalline solid in powder form, and Cl or chlorine, which appears as a greenish-yellow compressed liquid gas with a pungent smell.

Here is the equation,

CaCl2+ F2= CaF2+ Cl.

Final answer:

A reaction occurs when CaCl2 is combined with F2, resulting from fluorine's higher reactivity which allows it to displace chlorine in a single-replacement reaction.

Explanation:

A reaction will occur when CaCl2 is combined with F2. This is due to the fact that in the context of a single-replacement reaction, a more reactive halogen (in this case, fluorine) can displace a less reactive halogen (like chlorine in CaCl2) from its compound. The example provided in the supporting information illustrates a similar scenario where the reactivity of fluorine above bromine on the periodic table allows for the replacement to occur, yielding products such as CaF2 and Br2. Therefore, fluorine (F2) is the correct answer.

How does the position of a constellation change seasonally? Choose the two correct answers.


A.

It shifts from west to east.


B.

It shifts from east to west.


C.

It rotates around Earth.


D.

It revolves around the sun.


E.

It may be higher in the sky during winter.

Answers

Answer:

C,A

Explanation:

Answer:

c and a

Explanation:

What is the molality of a solution when 0.50 moles glucose is dissolved in 750 g of water?

Answers

Answer:

0.67mol/Kg

Explanation:

The following were obtained from the question:

Mole of solute = 0.50mol

Mass of solvent = 750g = 750/1000 = 0.75Kg

Molality =?

Molality = mole of solute /mass of solvent

Molality = 0.5/0.75

Molality = 0.67mol/Kg

ASAP help with these please.

Answers

Answer:

1. See explanation below

2. Density

3. Masses

Explanation:

1. Your picture is a bit too small to see the values but maybe this will help you.

To determine the maximum maximum mass in grams that triple beam balance can measure all you have to do is add up the maximum of each beam. So all you need to do is see the value at the last notch of each beam.

However, if you are referring to the picture that is attached in the bottom: The answer would be 610g. Because the last notches of each beam are as follows:

100 g

500 g

10 g

So we add that we get 610g.

2. density can be computed using the formula:

D = M/V

where:

D = density

M = mass

V = volume

As you can see in the both figures A and B measure 20 g, this means that their masses are the same. The density of objects can be different when either their masses, or their volumes are different. So even if they have the same mass, they can have different densities because they have different volumes.

3. Force of gravitational attraction between two objects is dependent on the masses of the two objects and the distance. The larger the mass, the stronger the gravitational force of attraction. This means that they have a direct relationship. Now when it comes to distance, the further apart they are the weaker the gravitational force of attraction, or in other words, they are indirectly related.

What is Delta.S for the reaction N2(g) +O2(g) Right arrow. 2NO? Use Delta.G = 173.3 kJ at 303.0 K and Delta.H = 180.7 kJ. Use Delta.G = Delta.H – TDelta.S.
7.4 J/K
7.4 kJ/K
24.42 kJ/K
24.42 J/K

Answers

Answer:

24.42 J/K

Explanation:

i got it right

Answer:

d

Explanation:

The purpose of controlling an experiment is to _____. A. double-check your own work B. compare one theory to another theory C. prevent the question from being testable D. make sure the results of the experiment are useful

Answers

D

Make sure the results of the experiment are useful

Explanation:

In an experiment, certain variables (independent variables) are controlled to check how they affect other variables (dependent variables) and understand the relationship between them. Also, these experiments usually have a control experiment, of no change, to help compare results and increases their reliability.

A television set changes electrical energy to sound and light energy.In this process, some energy is

Answers

Final answer:

In the transformation of electrical energy to sound and light by a television set, some energy is lost as heat due to the inefficiency of the device.

Explanation:

A television set changes electrical energy into sound and light energy. During this energy transformation process, some energy is usually lost as heat. This loss is primarily due to the inefficiency of electrical devices, where not all the incoming electrical energy is converted into the desired forms of energy.

The excess energy frequently dissipates as heat, which is released into the surroundings. This process aligns with the laws of thermodynamics, specifically the second law, which states that energy transformations are never 100% efficient.

define the vocabulary term , density ?

Answers

Answer:

density is defined as the ratio of mass to volume of a object

Answer:

The term density can be defined as the mass per unit volume of a substance.

Explanation:

The term density can be defined as the mass per unit volume of a substance.

The mathematical expression for density;

[tex]{Density P}=\frac{\text{Mass M}}{\text{Volume V}}[/tex]

The symbol for density is P, pronounced as "rho".

Also, the SI unit for measuring density is kg/m³.

The density of a material varies with temperature and pressure. This variation is typically small for solids and liquids but much greater for gases.


How does the process of cellular respiration create energy?

Answers

Answer:

well, through the process of cellular respiration, the energy in food is converted into energy that can be used by the body's cells. During cellular respiration, glucose and oxygen are converted into carbon dioxide and water, and the energy is transferred to ATP

Answer:

Oxygen is mixed with certain chemicals in a plant to make Carbon Dioxide and then the plant uses that to eat. So even if humans disappeared plants could still survive.

Explanation:

Select all that reasons that the reaction contents does not conduct at this low point.

There are too few cations from the base available (Ba+2).
There are too few anions from the acid available (SO4-2).
The water molecules formed are neutral.

Answers

It's all three of the answers

Answer:

All of these will be correct, so check-box all of them.

Explanation:

Can i please have brainliest?

What powers the lights of the vampire squid ?
A.The sun
B.Bacteria
C.Phosphorous

Answers

The vampire squid is almost entirely covered in light-producing organs called photophores, capable of producing disorienting flashes of light ranging in duration from fractions of a second to several minutes.

Final answer:

The vampire squid's lights are powered by bacteria called Vibrio fischeri.

Explanation:

The vampire squid possesses bioluminescent organs called photophores that enable it to produce light. These photophores are powered by bacteria called Vibrio fischeri which live symbiotically within the squid's light organs. The bacteria produce an enzyme called luciferase that acts on a substrate called luciferin, resulting in the emission of light.

What occurs in solvation?
A.) Solvent molecules surrounds solute ions.
B.) Ionic compounds are formed
C.) Solute ions separate from solvent molecules.
D.) Solvent molecules bind covalently to solute molecules.

Answers

Answer:

Choice A

Explanation:

Solvation describes the surrounding of solute ions by solvent molecules.

Final answer:

Solvation involves the intermolecular interactions of a solute with the surrounding solvent. In the case of ionic solutes, solvent molecules surround each ion and separate it from the rest of the solid. In the case of molecular solutes, each particle of the solute is surrounded by solvent particles, forming a solution. The correct option is A.

Explanation:

Chemically, a solvent will dissolve or "solvate" a solute. Solvation describes the intermolecular interactions of a molecule or ion in solution with the surrounding solvent. In the case of solvation in polar solvents, such as water, solvent molecules surround each ion of the ionic solute and separate it from the rest of the solid. This process is also referred to as hydration. On the other hand, in the case of solvation of a molecular solute like sucrose, each particle of the solute is surrounded by particles of the solvent, forming a solution.

Describe the energy transformation when a match burns.


Your answer should include at least 2 complete sentences.

Answers

The burning of a match is an exothermic reaction. Heat is being released as a result of the reaction.

Hydrogen gas (H2) and oxygen gas (O2) react to form liquid hydrogen peroxide (H2O2). Which statement is true about the reaction?
A.
The same atoms are present, so the chemical properties are the same.
B.
The atoms of the reactants have combined to form a new substance.
C.
The two gases have mixed together, but a new substance has not formed.
D.
The product that is formed has the same physical properties as the reactants.

Answers

Answer:

B. The atoms of the reactants have combined to form a new substance.

Explanation:

When hydrogen and oxygen gas combined they form hydrogen peroxide. This is happen through chemical reaction so a new substance is formed. The state of reactant is also different, reactants are present in gaseous form while product is present in liquid form. So option b is correct.

Chemical change:

The changes, that occur due to change in the composition of a substance and result in a different compound is known as chemical change.

These changes are irreversible

These changes occur due to chemical reactions

These may not be observed with naked eye

Example:

Combustion of fuel or wood: that oil or wood convert into energy, CO2 and ash in case of wood

Boiling of egg: that change the chemical composition of protein in the egg .

The reaction of Hydrogen and oxygen:

H 2 (g)  + O 2  (g) -------------------------------------> H2O2  (l)

The answer is B .The atoms of the reactants have combined to form a new substance.

Explanation: The chemical reaction has combined the atoms of hydrogen gas and the atoms of oxygen gas to form a new substance. Since hydrogen peroxide is a different substance, it has different chemical and physical properties. All chemical reactions produce new substances with different chemical and physical properties than the reactants.

Convert 7.50 grams of glucose C6H12O6 to moles

Answers

Answer:

The number of mole is 0.04167mole

Explanation:

To convert gram to mole, we need to calculate the molecular weight of the compound

C6H12O6

C - 12

H - 1

O - 16

Molecular weight = 6 * 12 + 1 *12 + 6 * 16

= 72 + 12 + 96

= 180g/mol

To covert gram to mole

Therefore,

= 7.50g/ 180g/mol

= 0.04167 mole of glucose

Determine the length with accuracy and correct degree of precision. 12.48 cm, 12.5 cm, 2.10 cm,12 cm

Answers

Answer:

12 is the length with accuracy and correct degree of precision.

Explanation:

Answer:

12 cm

That's your answer!!

How can I find the solution needed for amount of reaction?

Answers

Answer:

0.48L of NaOH

Explanation:

Data obtained from the question include:

Number of mole of NaOH = 0.725mol

Molarity of NaOH = 1.50M

Volume of NaOH =?

Molarity = mole /Volume

Volume = mole /Molarity

Volume = 0.725/1.5

Volume = 0.48L

Therefore, 0.48L of NaOH is needed for the reaction


Which factor most directly affects potential energy?

Answers

Answer:

Mass, gravitational force and height

Explanation:

Potential energy of body is the energy at rest in a body and it depends on the mass, acceleration due to gravity and height of a body;

  Potential energy = mass x gravity x height  = mgh

The more the mass, gravity and height of a body, the higher the potential energy a body will posses. This is why a stone at a height has more potential energy than one on the ground.

How many grams of magnesium are needed to completely react
with 2.00 mol of O2 in the synthesis reaction that produces
magnesium oxide?

Answers

97.22 grams of magnesium is needed.

Explanation:

The molar ratio of Mg to O2  to make MgO is 2:1

Here, we have 2 moles of O2, therefore we need 4 moles of Mg.

1 mol of Mg = 24.305 g

Therefore

4 moles of Mg = 4 [tex]\times[/tex] 24.305 g

                        = 97.22 g

Hence we need 97.22grams of magnesium are needed to completely reactwith 2.00 mol of O2 in the synthesis reaction that producesmagnesium oxide.

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