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CHM 1026 1
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Chapter 18—Entropy and Free Energy 
1. When a chemical process occurs under standard conditions, which of the following conditions always 
apply? 
1. Gaseous species are at a pressure of 1 bar. 
2. Solution concentrations species are 1 molal. 
3. The temperature is 298.15 K. 
a. 1 only b. 2 only c. 3 only d. 1 and 2 e. 1, 2, and 3 
2. Which of the following statements regarding the spontaneity of chemical and physical changes is correct? 
a. A reaction may be spontaneous only in one direction....
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Brevard Community College•CHM 1026
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Chapter 18—Entropy and Free Energy 
1. When a chemical process occurs under standard conditions, which of the following conditions always 
apply? 
1. Gaseous species are at a pressure of 1 bar. 
2. Solution concentrations species are 1 molal. 
3. The temperature is 298.15 K. 
a. 1 only b. 2 only c. 3 only d. 1 and 2 e. 1, 2, and 3 
2. Which of the following statements regarding the spontaneity of chemical and physical changes is correct? 
a. A reaction may be spontaneous only in one direction....