The combustion enthalpies of carbon, hydrogen and methane are \[-395.5\,kJ\,mo{{l}^{-1}}\], \[-285.8\,kJ\,mo{{l}^{-1}}\] and \[-890.4\,kJ\,mo{{l}^{-1}}\] respectively at \[{{25}^{o}}C\]. The value of standard formation enthalpies of methane at that temperature is [Pb. PMT 1998]

The combustion enthalpies of carbon, hydrogen and methane are \[-395.5

1.	The combustion enthalpies of carbon, hydrogen and methane are \[-395.5\,kJ\,mo{{l}^{-1}}\], \[-285.8\,kJ\,mo{{l}^{-1}}\] and \[-890.4\,kJ\,mo{{l}^{-1}}\] respectively at \[{{25}^{o}}C\]. The value of standard formation enthalpies of methane at that temperature is [Pb. PMT 1998]
A.	\[890.4\,kJ\,mo{{l}^{-1}}\]
B.	\[-298.8\,kJ\,mo{{l}^{-1}}\]
C.	\[-74.7\,kJ\,mo{{l}^{-1}}\]
D.	\[-107.7\,kJ\,mo{{l}^{-1}}\]
Answer» D. \[-107.7\,kJ\,mo{{l}^{-1}}\]

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The combustion enthalpies of carbon, hydrogen and methane are \[-395.5\,kJ\,mo{{l}^{-1}}\], \[-285.8\,kJ\,mo{{l}^{-1}}\] and \[-890.4\,kJ\,mo{{l}^{-1}}\] respectively at \[{{25}^{o}}C\]. The value of standard formation enthalpies of methane at that temperature is [Pb. PMT 1998]

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