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The difference between Delta H and Delta...

The difference between `Delta H` and `DeltaU(DeltaH - DeltaU)`, when the combustion of one mole of heptane (l) is carried out at a temperature T, is equal to:

A

`-4RT`

B

`4RT`

C

`-3RT`

D

`3RT`

Text Solution

Verified by Experts

The correct Answer is:
A
`C_7 H_16(l) + 11O_2(g) to 7CO_2(g) + 8H_2O(l)`
`Deltan_g =7 - 11 = -4`
`DeltaH = DeltaU + Deltan_g RT`
`DeltaH - DeltaU = - 4RT`.
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