What does the 2 represent on the energy diagram?

B) Change in energy between products and reactions, ΔH

A potential energy diagram for a chemical reaction is given below. Each interval on the potential energy axis represents 500. kilojoules of potential energy. What can be concluded from the diagram?

B) The reaction is endothermic, and the heat of reaction is +1000 kJ.

A) The reaction is endothermic, and the heat of reaction is -500 kJ.

C) The reaction is exothermic, and the heat of reaction is -500 kJ.

D) The reaction is exothermic, and the heat of reaction is +1000 kJ.

A model for a reaction is on the left; notice the coefficients. Based on this information, which statement is best supported by the model?

A) This is endothermic because the reactants have more energy than the products.

B) The total bond energies of the product molecules is equal to the total bond energies of the reactant molecules because the number and types of atoms are equal.

C) Energy is transferred to the surroundings when H2O2 decomposes because there are more bonds in the reactant molecules than the product molecules.

D) The average O=O bond energy is higher than the average O-O bond energy because more energy is released when a O=O bond forms than the energy absorbed when O-O bonds break.

Endothermic reactions tend to _________________.

Feel cold as they absorb energy.

Feel hot as they absorb energy.

Feel hot as they release energy.

Feel cold as they release energy.

What does the 1 represent on the energy diagram?

B) Change in energy between products and reactions, ΔH

24-25 Bond Energy and Potential Energy Diagrams TEST REVIEW

11th Grade

•

23 Qs

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24-25 Bond Energy and Potential Energy Diagrams TEST REVIEW

Quiz

•

Science

•

11th Grade

•

Practice Problem

•

Easy

•

NGSS

HS-PS1-4, MS-PS1-2, HS-PS1-5

Standards-aligned

Renay Treat

Used 5+ times

FREE Resource

23 questions

Show all answers

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Instant ice packs like the one shown below change from room temperature to very cold when you activate them. Drag and drop the best statement about how this ice pack works once it's activated into the white box.

pulling on the pack removes potential energy from it and cools it down

a small refrigerator cools the pack down

a chemical reaction in the pack occurs that releases energy

a chemical reaction occurs in the pack that absorbs energy

Tags

NGSS.HS-PS1-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Consider energy transfer during the chemical reaction of a burning candle. Drag and drop the best statement about this reaction into the white box.

this chemical reaction of combustion releases energy

this chemical reaction of combustion absorbs energy

the candle doesn't have internal energy to release

there is no energy transfer as the candle burns because it is at equilibrium

Tags

NGSS.HS-PS1-4

MULTIPLE SELECT QUESTION

30 sec • 1 pt

As water and sulfuric acid are mixed together the temperature of the mixture becomes very hot. Select the two statements that best describe why this happens. Assume that both substances start out at room temperature and there is no external heat source affecting them.

A. A chemical reaction is occurring.

B. Energy is released during the chemical reaction.

C. Energy is absorbed during the chemical reaction.

D. No chemical reaction occurs because water is inert.

E. The lack of a chemical reaction causes the temperature to increase.

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

DROPDOWN QUESTION

30 sec • 1 pt

The figure on the left represents a(n) (a) reaction that is a
(b) chemical reaction in which the total bond energies of the products are (c) that of the reactants. The figure on the left depicts a (d) change in which the total bond energies (e) .

exothermic

less than

physical

stay the same

chemical

Tags

NGSS.HS-PS1-4

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Which of the following could indicate that a chemical change took place?

change of color

change in temperature or energy

formation of gases

all of the above

Tags

NGSS.MS-PS1-2

DROPDOWN QUESTION

30 sec • 1 pt

Energy diagram A and B are (a) .

endothermic / exothermic

exothermic/endothermic

Tags

NGSS.HS-PS1-4

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Below is an energy diagram for a certain chemical reaction. What is the total change in bond energy of the reaction? Note: bond energy is calculated the same as ΔH, reverse.

-338 kJ

676 kJ

240 kJ

-240 kJ

Tags

NGSS.HS-PS1-4

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24-25 Bond Energy and Potential Energy Diagrams TEST REVIEW

23 questions

Instant ice packs like the one shown below change from room temperature to very cold when you activate them. Drag and drop the best statement about how this ice pack works once it's activated into the white box.

Consider energy transfer during the chemical reaction of a burning candle. Drag and drop the best statement about this reaction into the white box.

As water and sulfuric acid are mixed together the temperature of the mixture becomes very hot. Select the two statements that best describe why this happens. Assume that both substances start out at room temperature and there is no external heat source affecting them.

The figure on the left represents a(n) (a) reaction that is a
(b) chemical reaction in which the total bond energies of the products are (c) that of the reactants. The figure on the left depicts a (d) change in which the total bond energies (e) .

Which of the following could indicate that a chemical change took place?

Energy diagram A and B are (a) .

Below is an energy diagram for a certain chemical reaction. What is the total change in bond energy of the reaction? Note: bond energy is calculated the same as ΔH, reverse.

What is the activation energy of the product?

What is the activation energy of the reactants?

What does the 2 represent on the energy diagram?

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

24-25 Bond Energy and Potential Energy Diagrams TEST REVIEW

23 questions

Instant ice packs like the one shown below change from room temperature to very cold when you activate them. Drag and drop the best statement about how this ice pack works once it's activated into the white box.

Consider energy transfer during the chemical reaction of a burning candle. Drag and drop the best statement about this reaction into the white box.

As water and sulfuric acid are mixed together the temperature of the mixture becomes very hot. Select the two statements that best describe why this happens. Assume that both substances start out at room temperature and there is no external heat source affecting them.

The figure on the left represents a(n) ​ (a) reaction that is a (b) chemical reaction in which the total bond energies of the products are (c) that of the reactants. The figure on the left depicts a (d) change in which the total bond energies (e) .

Which of the following could indicate that a chemical change took place?

Energy diagram A and B are (a) .

Below is an energy diagram for a certain chemical reaction. What is the total change in bond energy of the reaction? Note: bond energy is calculated the same as ΔH, reverse.

What is the activation energy of the product?

What is the activation energy of the reactants?

What does the 2 represent on the energy diagram?

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

The figure on the left represents a(n) (a) reaction that is a
(b) chemical reaction in which the total bond energies of the products are (c) that of the reactants. The figure on the left depicts a (d) change in which the total bond energies (e) .