A) 180 kJ
B) 186.4 kJ
C) 166.0 kJ
D) 160 kJ
Correct Answer: C
Solution :
\[CaC{{O}_{3}}(g)\rightleftharpoons CaO(s)+C{{O}_{2}}(g)\] \[(\Delta {{n}_{g}}=1-0=1)\] We know that, \[\Delta H=\Delta E+\Delta {{n}_{g}}RT\] \[176=\Delta E +1\times 8.31\times {{10}^{-3}}\times (273\,+927)\] \[\therefore \] \[\Delta E=176-8.31\times {{10}^{-31}}\times 1200\] \[=176-9.97\] \[=166.03\,\text{kJ}\]You need to login to perform this action.
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