Sample Problem 20.7
PROBLEM:
Calculating DG at non-standard conditions
The oxidation of SO2,
is too slow at 298 K to be useful in the manufacture of sulfuric acid. To overcome this low rate, the process is conducted at an elevated temperature.
(a) Calculate K at 298 K and at 973 K. (DGo298 = -141.6 kJ/mol for the reaction as written using DHo and DSo values. At 973 K, DGo973 = 12.12 kJ/mol for the reaction as written.)
(b) In experiments to determine the effect of temperature on reaction spontaneity, two sealed containers are filled with 0.500 atm of SO2, 0.0100 atm of O2, and 0.100 atm of SO3 and kept at 25 oC and at 700. oC. In which direction, if any, will the re
(c) Calculate DG for the system in part (b) at each temperature.
PLAN:
Use the equations and conditions found on previous slides.
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