A) \[+1412\,\,kJ/mol\]
B) \[+141.2\,\,kJ/mol\]
C) \[-141.2\,\,kJ/mol\]
D) \[-14.2\,\,kJ/mol\]
Correct Answer: C
Solution :
Given: Enthalpies of\[{{C}_{2}}{{H}_{4}}(g),\,\,C{{O}_{2}}(g)\]and\[{{H}_{2}}O\,\,(l)\]\[52,\,\,-394\]and\[-286\]respectively. We know that \[{{C}_{2}}{{H}_{4}}+3{{O}_{2}}\xrightarrow{{}}2C{{O}_{2}}+2{{H}_{2}}O\] Therefore, total enthalpy of their combustion \[=2\times (-394)+2\times (-286)-(52)\] \[=-1412\,\,kJ/mol\]You need to login to perform this action.
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