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Enthalpy of CH(4)+(1)/(2)O(2)rarrCH(3)OH...

Enthalpy of `CH_(4)+(1)/(2)O_(2)rarrCH_(3)OH` is negative. If enthalpy of combustion of `CH_(4)` and `CH_(3)OH` are `x` and `y` respectively, then which relation is correct?

A

`x gt y`

B

`x lt y`

C

`x=y`

D

`x ge y`

Text Solution

Verified by Experts

The correct Answer is:
B
`CH_(4)(g)+(1)/(2)O_(2)(g) to CH_(3)OH(l)`
`therefore DeltaH=-[(DeltaH_(c) " of " CH_(3)OH) -(DeltaH_(c) " of " CH_(4))]`
`=-[(-y)-(-x)]=-[-y+x]=y-x`
`therefore x lt y`
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