Chemistry 520 Winter Quarter 2008 Take Home Quiz 5 This quiz is due no later than 4 pm on Wednesday, Mar. 5, 2008 in room 0048 McPherson lab. Write down ﬁrst the mathematical equation with symbols and leave the numerical substitution at the end. Submit your answers on single sided paper. 1. Identify the number of components and phases that exist in each system. Assume no component other than the ones given exists in each system. (a) A system containing ice and water. (b) A 50:50 solution of water and ethanol, C 2 H 5 OH. (c) A pressurized tank of carbon dioxide that contains both liquid and gas. (d) A bomb calorimeter containing a pellet of benzoic acid, C 6 H 5 COOH(s), and 25.0 bar of O 2 gas. (e) The same bomb calorimeter after the explosion, in which the benzoic acid is converted to CO 2 (g) and H 2 O(l), and assuming excess oxygen. 2. Determine whether the chemical potentials of the two phases listed are the same or diﬀerent. If they are diﬀerent, state which one is lower than the other. (a) H
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