Answer: Determining the Effect of Temperature on
Chapter , Problem 2PE(choose chapter or problem)
Problem 2PE
Determining the Effect of Temperature on Spontaneity
The Haber process for the production of ammonia involves the equilibrium
N2(g) + 3 H2(g)2 NH3(g)
Assume that and
for this reaction do not change with temperature (a) Predict the direction in which
for the reaction changes with increasing temperature (b) Calculate
at 25 °C and at 500 °C.
(a) Using standard enthalpies of formation and standard entropies in Appendix C. calculate and
at 298 K for the reaction 2 SO2(g) + O2(g)
. (b) Use your values from part (a) to estimate
at 400 K.
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