Page 1314 - Chemistry--atom first
P. 1314
1304 Answer Key
83.
85. 507 g 87. 33 g
89. (a) Both gases must increase in pressure. (b)
91. (a) 0.33 mol.
(b) [CO]2 = 0.50 M Added H2 forms some water to compensate for the removal of water vapor and as a result of a shift to the left after H2 is added.
93.
95. (a) (b) [NH3] must increase for Qc to reach Kc. (c) That decrease in pressure would
decrease [NO2]. (d) 97. [fructose] = 0.15 M
99.
101. (a) HB ionizes to a greater degree and has the larger Kc. (b) Kc(HA) = 5 10−4
Kc(HB) = 3 10−3
103. In each of the following, the value of ΔG is not given at the temperature of the reaction. Therefore, we must calculate ΔG from the values ΔH° and ΔS and then calculate ΔG from the relation ΔG = ΔH° − TΔS°.
(a) K = 1.29;
(b) K = 2.51 10−3;
(c) K = 4.83 103; (d) K = 0.219;
(e) K = 16.1
105. The standard free energy change is
When reactants and products are in
their standard states (1 bar or 1 atm), Q = 1. As the reaction proceeds toward equilibrium, the reaction shifts left (the amount of products drops while the amount of reactants increases): Q < 1, and becomes less positive as it approaches zero. At equilibrium, Q = K, and ΔG = 0.
107. The reaction will be spontaneous at temperatures greater than 287 K. 109.K=5.35 1015
The process is exothermic.
111. 1.0 10−8 atm. This is the maximum pressure of the gases under the stated conditions.
113. 115. −0.16 kJ
Chapter 14
1. One example for NH3 as a conjugate acid: as a conjugate base:
3. (a) (b) (c)
(d) (e) This OpenStax book is available for free at http://cnx.org/content/col12012/1.7
