Chemical Thermodynamics Question 422
Question: Standard enthalpy and standard entropy changes for the oxidation of ammonia at 298 K are $ -382.64kJmo{{l}^{-1}} $ and $ -45.6J{{K}^{-1}}mo{{l}^{-1}} $ , respectively Standard Gibb’s energy change for the same reaction at 298 K is
Options:
A) $ -22.1,kJ,mo{{l}^{-1}} $
B) $ -339.3kJmo{{l}^{-1}} $
C) $ -439.3kJ,mo{{l}^{-1}} $
D) $ -523.2kJmo{{l}^{-1}} $
Show Answer
Answer:
Correct Answer: B
Solution:
- $ \Delta G=\Delta H-T\Delta S $
$ =-382.64-( 298\times 145.6\times {{10}^{-3}} ) $
$ =-339.3kJ,mo{{l}^{-1}} $
