A) \[-0.6\]
B) \[-1.2\]
C) \[+0.6\]
D) \[+1.2\]
Correct Answer: C
Solution :
\[{{C}_{(graphite)}}+2{{H}_{2}}(g)\xrightarrow{{}}C{{H}_{4}}(g)\] \[\Delta H=\Delta E+\Delta {{n}_{g}}RT\] \[\Delta E-\Delta H=-\Delta {{n}_{g}}RT\] \[\Delta {{n}_{g}}=1-2=-1\] \[\Delta E-\Delta H=-(-1)\times 2\times 300\] \[=600\,\,cal\] \[=0.6\,\,kcal\]
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