PracticeFinalPart2 - 1st Semester Physical Chemistry...

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1 st Semester Physical Chemistry Practice Final 2 1. Put a positive or negative sign next to each of the following to mark whether the entropy of the system increases or decreases during the following transformations: (2 points each) a. Melting b. Vaporization c. Compression d. Precipitation e. Freezing f. Condensation g. Mixing 2. Put a positive or negative sign next to each of the following to denote whether entropy generally increases or decreases when the following happens (2 points each) a. Gases are formed from liquids and solids b. A solid and a liquid combine to form a solution c. A reaction occurs where there are fewer reactant molecules than product molecules. d. Temperature is decreased. 3. During a transformation, the signs of Δ H and Δ S are in the table below. Write down whether the process is always spontaneous, never spontaneous, or sometimes spontaneous. (3 points each) Δ H Δ S Spontaneous? + + + - - + - -
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4. The second law of thermodynamics makes statements about whether processes are allowed or disallowed. Consider the following processes and state whether they are allowed or disallowed. (5 points each) a. E
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This note was uploaded on 09/08/2010 for the course CHEM 160 at San Jose State University .

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PracticeFinalPart2 - 1st Semester Physical Chemistry...

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