Enthalpy of Reaction

Question 1

Which statement is true? [___]

Revolt · Accepted Answer

The first equation must be reversed and the third equation doubled.

Question 2

Use the enthalpy diagram on the right to answer the following questions.Which arrow(s) represent endothermic reactions? Which arrow represents the overall reaction? Is the overall reaction endothermic or exothermic? Which statement is true?

Revolt · Accepted Answer

endothermic

Question 3

Use the enthalpy diagram on the right to answer the following questions.Which arrow(s) represent endothermic reactions? Which arrow represents the overall reaction? Is the overall reaction endothermic or exothermic? Which statement is true?

Revolt · Accepted Answer

A, B and C are intermediate reactions.

Question 4

Question 5

Revolt · Accepted Answer

Answer image: //media.edgenuity.com/EVresources/3210-08-09-20-03-task/mc001-1.jpg; Answer image: //media.edgenuity.com/EVresources/3210-08-09-20-03-task/mc001-3.jpg

Question 5

How should you manipulate these equations so that they produce the equation below when added? Check all that apply. CaO(s) + CO2(g) → CaCO3(s) reverse the direction of equation (2)multiply equation (1) by 3multiply equation (2) by 1/2

Revolt · Accepted Answer

reverse the direction of equation (2)

Question 6

What must be done to calculate the enthalpy of reaction? Check all that apply.The first equation must be halved.The first equation must be reversed.The second equation must be halved.The second equation must be reversed.The third equation must be halved. The third equation must be reversed. What is the overall enthalpy of reaction?Hrxn = kJ

Revolt · Accepted Answer

The first equation must be halved.; The second equation must be halved.; The second equation must be reversed.; The third equation must be halved.

Question 7

What must be done to calculate the enthalpy of reaction? Check all that apply.The first equation must be halved.The first equation must be reversed.The second equation must be halved.The second equation must be reversed.The third equation must be halved. The third equation must be reversed. What is the overall enthalpy of reaction?Hrxn = kJ

Revolt · Accepted Answer

-108.7

Question 8

Question 10

Revolt · Accepted Answer

74.6 kJ; exothermic; has a magnitude that is less than that of B; represents the overall enthalpy of reaction

Question 9

Use the enthalpy diagram on the right to answer the following questions.Which arrow(s) represent endothermic reactions? Which arrow represents the overall reaction? Is the overall reaction endothermic or exothermic? Which statement is true?

Revolt · Accepted Answer

A and D; D; endothermic; A, B and C are intermediate reactions.

Question 10

Complete the following based on the diagram.Arrow A: [___]

Revolt · Accepted Answer

–184.6 kJ; 74.6 kJ; exothermic; has a magnitude that is less than that of B; represents the overall enthalpy of reaction

Enthalpy of Reaction Answers

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