CW18-G&amp;K

# CW18-G&K - CHM 2046/Myers 2010 1. Worksheet 18 February...

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CHM 2046/Myers Worksheet 18 February 24, 2010 1. Predicting Spontaneity Using H and S. A reaction tends to be spontaneous if H = ________ and/or S = ________. IF THEN Predict H = – and S = + H = + and S = – H = + and S = + H = – and S = – 2. Predicting Spontaneity Using G = H - T S. Calculating G°: Using Tables, like with H f ° ( G f ° for elements = 0) Using G° = H° - T Problem : For reaction as H 2 O(l) H 2 O(g), calculate H°, S° and G° at 25 °C. H° = _____________ S° = _____________ G° = _____________ Effect of T on = H° - T S° and spontaneity: For H 2 O (l) H 2 O (g), H° = ___ and S° = ___ At low T At high T For 2 NO 2 (g) N 2 O 4 (g), H° = ___ and S° = ___ At low T At high T Co(OH 2 ) 6 +2 (aq) + 4 Cl - (aq) CoCl 4 - 2 (aq) + 6 H 2 O (l) Observed : at low T this shifts _______ and at high T this shifts ______

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## This note was uploaded on 09/19/2011 for the course CHM 2051 taught by Professor Staff during the Spring '08 term at University of Florida.

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CW18-G&K - CHM 2046/Myers 2010 1. Worksheet 18 February...

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