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The heats of xombustion of carbon, hydro...

The heats of xombustion of carbon, hydrogen and ethane are 94, 68.3 and 373 Kcal/mole respectively. The heat of formation of ethane in K. cals/ mole is

A

`+19.9`

B

`-19.9`

C

`+39.8`

D

`-39.8`

Text Solution

Verified by Experts

The correct Answer is:
B
`2C+3H_(2)rarrC_(2)H_(6),DeltaH=H_(R)-H_(P)`
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