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TExES Science 7-12: Energy Transformations 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 of the following statements about Gibbs free energy is false?

Question 2 2. A small metal rod is placed in a hot oven and heated to 100 degrees C. What happens to the rod?

Question 3 3. An endothermic reaction is:

Question 4 4. The Gibbs free energy is ______.

Question 5 5. Table salt dissolves spontaneously in water because the change in Gibbs free energy is ______.

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Question 6 6. Choose the incorrect statement.

Question 7 7. The temperature of one substance is 90 degrees F and another substance is 50 degrees F. If they are placed close together, what will happen ?

Question 8 8. Which of the following is the best definition of thermal expansion?

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

Question 10 10. What does the average kinetic energy of the atoms in a gold ring determine about the ring?

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Question 11 11. Why do bridges need expansion joints?

Question 12 12. If you put a piece of chocolate in your mouth and it melts, what mechanism is used to melt the chocolate?

Question 13 13. The change of Gibbs free energy predicts ______.

Question 14 14. Why does running a jar under hot water make it easier to open?

Question 15 15. A metal bar has an original length of 2 meters and an expansion coefficient of 0.01. If you heat it up from 27 degrees Celcius to 37 degrees Celcius, by how much will the length change?

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Question 16 16. What does the linear coefficient of thermal expansion refer to?

Question 17 17. What does it mean when the enthalpy change for a reaction is negative?

Question 18 18. Chemicals tend to always _______.

Question 19 19. Enthalpy change is

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

TExES Science 7-12: Energy Transformations 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!

TExES Science 7-12 (236): Practice & Study Guide  /  Science Courses
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