5.32.Consider the balanced chemical reaction
CH 4 (g) Br 2 (g) →CH 2 Br 2 (g) 2HBr (g)A system starts with 10.0 mol CH 4 and 3.75 mol Br 2 , and
0.00 mol of the two products. Plot versus amount of each
product and reactant. Comment on the differences in the plot.
5.33.For the gas-phase reaction
2H 2 O 2 →2H 2 O(^) rxnG° is 457.18 kJ. What does a graph of Gversus ln Q
(ln Qvarying from 50 to 50) look like at 25°C? Change the
temperature and find out if the graph looks substantially dif-
ferent at different temperatures.
5.34.Simple equilibrium problems can get mathematically
complicated when the coefficients are different small whole
numbers. For the balanced reaction
2SO 3 (g) →S 2 (g) 3O 2 (g)
the equilibrium constant has a value of 4.33 10 ^2 at some
elevated temperature. Calculate the equilibrium concentra-
tions of all species if the initial amount of SO 3 were (a)0.150
atm, (b)0.100 atm, (c)0.001 atm.
140 Exercises for Chapter 5
Symbolic Math Exercises