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For the reation F(2)(g)+2HCL(g)rarr2HF(g...

For the reation `F_(2)(g)+2HCL(g)rarr2HF(g)+C1_(2)(g)`
`DeltaH^(@)` at `298K` is `-84.4Lcal` , `DeltaH^(@)f(HF)=-64.2Kcal//mol`
`DeltaH^(@)f` for the `HCL(g)` per gram is

A

`-0.603Kcal`

B

`-0603cal`

C

`0.0603Kcal`

D

`6.03Kcal`

Text Solution

Verified by Experts

The correct Answer is:
A
`F_(2)(g)+2HCL(g)rarr2HF(g)+C1_(2)(g)`
`DeltaH=-84.4=-128-2DeltaH_(f)(HCL1)`
`DeltaH_(f)(HC1)=-22Kcal//mol`
`DeltaH_(f)(HC1)=-0.603Kcal//g`
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