Prentice Hall Chemistry Chapter 17: Thermochemistry Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. Which statement is correct about heat?

Question 2 2. An endothermic reaction is:

Question 3 3. Which of the following substances has the highest specific heat capacity?

Question 4 4. The total energy contained within a substance is termed ...

Question 5 5. A(n) _____ reaction absorbs heat from the surroundings, while an _____ reaction results in heat flowing out of the system.

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Question 6 6. Enthalpy change is

Question 7 7. Which of the following is TRUE of a thermochemical equation?

Question 8 8.

2Ba(s) + O2(g) = 2BaO(s) deltaH = -1107.0 kJ

Ba(s) + CO2(g) + ½O2(g) = BaCO3(s) deltaH = - 822.5 kJ

Given the data above, calculate delta H for the following reaction:

BaCO3(s) = BaO(s) + CO2(g)

Question 9 9. When a bond forms, energy is given off to the surroundings. This is an example of

Question 10 10. Which of the following is FALSE of Hess's Law?

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Question 11 11. The enthalpy change of a reaction can be calculated using the following equation:

Question 12 12. Calculate the specific heat capacity of the following substance. 200 Joules are required to raise the temperature of 10 grams of the substance 10 degrees Celsius.

Question 13 13. Water takes longer to boil than alcohol because water has ...

Question 14 14. _____ is a measure of the random motion of particles. _____ is the transfer of energy between two objects due to temperature difference.

Question 15 15. What does it mean when the enthalpy change for a reaction is negative?

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Question 16 16.

For the reaction Xe(g) + 2F2(g) = XeF4(g)

the enthalpy change is delta H = -251 kJ.

If I wanted to make twice the amount of the products from twice as much reactants, what would be the value of delta H?

Question 17 17. The average kinetic energy of a substance is termed ...

Question 18 18. What is the main principle of the First Law of Thermodynamics?

Question 19 19. When manipulating thermochemical equations, if I divide the coefficients of the chemical reaction of one step by 3, then what do I need to do to the enthalpy change value?

Question 20 20. An example of an exothermic reaction is:

Prentice Hall Chemistry Chapter 17: Thermochemistry Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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