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MTLE Middle Level Science: Understanding Chemical Reactions, Thermodynamics & Kinetics 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!

Page 1

Question 1 1. The Activation Energy of a reaction

Question 2 2. A spontaneous reaction occurs in a given set of conditions _____.

Question 3 3. Ionic bonds depend on:

Question 4 4. Which of the following is a strong acid?

Question 5 5.

The second law of thermodynamics states that:

I. Energy can neither be created nor destroyed

II. All free energy cannot be converted into usable energy

III. The entropy of a system increases over time

Page 2

Question 6 6. A catalyst

Question 7 7. If dissolving carbon dioxide in water to form carbonic acid is the forward reaction, what is the reverse reaction that balances this reaction in chemical equilibrium?

Question 8 8. Which of the following is another term for the heat of reaction?

Question 9 9. What is the equation for the equilibrium constant of the reaction nA + mB → xC + yD?

Question 10 10. What is the net charge of two ions bonded together?

Page 3

Question 11 11. The heat of reaction is -85.0 kJ and the entropy change for the reaction is +9.50 J/K. At 298K, what is the value of Delta G, and will the process be spontaneous or non-spontaneous?

Question 12 12. When something is moving it has _____ energy.

Question 13 13. Which of the following statements is true of spontaneous reactions?

Question 14 14. Which of the following is a strong base?

Question 15 15. A homogenous catalyst

Page 4

Question 16 16. How is reaction rate measured?

Question 17 17.

Choose the correctly balanced equation for the following reaction:

Potassium + water → potassium hydroxide + hydrogen gas

Question 18 18. Which type of reaction always requires oxygen to be a reactant?

Question 19 19. How do the properties of sodium and chlorine, compare to the properties of sodium chloride?

Question 20 20. Which of the following equations is balanced?

Page 5

Question 21 21. Fill in the blank: The total number of atoms before a reaction happens is _____ the total number of atoms after a reaction happens.

Question 22 22. What does an increase in temperature do to the reaction rate?

Question 23 23. Compound X is converted to elements A and B. Compound X has undergone a _____ reaction.

Question 24 24. Why is it beneficial to use a logarithmic scale to measure pH?

Question 25 25. When energy is unavailable to be used it is called _____.

Page 6

Question 26 26. The pH scale is a way of measuring _______.

Question 27 27. What is chemical equilibrium?

Question 28 28. We can qualitatively predict if a reaction will have an increase in entropy by looking at _____.

Question 29 29. Which of the following concepts best describes a chlorophyll molecule absorbing light and changing it into chemical energy?

Question 30 30. Chemical reactions are _____.

MTLE Middle Level Science: Understanding Chemical Reactions, Thermodynamics & Kinetics 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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