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For the reaction C(3)H(8)(g)+5O(2)rarr...

For the reaction
`C_(3)H_(8)(g)+5O_(2)rarr3CO_(3)(g)+4H_(2)O(l)`
at constant temperature, `DeltaH-DeltaU` is

A

`+3RT`

B

`-RT`

C

`+RT`

D

`-3RT`

Text Solution

Verified by Experts

The correct Answer is:
D
For the reaction
`C_(3)H_(8)(g) + 4O_(2)(g) to 3CO_(2)(g) + 4H_(2)O(l)`
`Deltan_(g)` =number of gaseous moles of products -number of gaseous moles of reactants
`=3-6=-3`
`therefore DeltaH=DeltaE+ DeltanRT`
or `DeltaH-Delta E=DeltanRT`
`therefore DeltaH-DeltaE=-3RT`
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