Entropy WS-Key

Entropy WS-Key - Chem 124 Entropy/Free Energy Worksheet 1....

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Chem 124 Entropy/Free Energy Worksheet Dr. Meadows 1. Give the five situations that generally result in an increase of entropy. a. pure liquid or solution forms from a solid i.e. dissolving b. gas formation from a solid or liquid c. no. of moles of gaseous species changes in going from rct pdts d. temp. of a substance increases e. chemical complexity/size increases 2. Would you expect the entropy to increase or decrease in each of the following? a. CCl 4 (l) CCl 4 (g) increase b. CuSO 4 3H 2 O (s) + 2H 2 O (g) CuSO 4 5H 2 O (s) decrease c. SO 3 (g) + H 2 (g) SO 2 (g) + H 2 O (g) ambiguous d. H 2 (g, 1 atm) H 2 (g, 2 atm) decrease e. C (s, graphite) C (s, diamond) increase 3. Using the tables of thermodynamic data, calculate the standard molar entropy change ( S ° 298 ) for the synthesis of ammonia gas from its elements: N 2 (g) + 3H 2 (g) 2NH 3 (g) -197.3 J/K 4. Consider the reaction below and without reference to any data tables, draw the proper conclusion on which condition A-D best represents the reaction being
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Entropy WS-Key - Chem 124 Entropy/Free Energy Worksheet 1....

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