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If H(2)S+3/2 O(2) rarr H(2)O+SO(2), De...

If `H_(2)S+3/2 O_(2) rarr H_(2)O+SO_(2)`,
`DeltaH=-136.7` Kcal
`H_(2)+1/2 O_(2) rarr H_(2)O, DeltaH=-68.4` Kcal
`S+O_(2) rarr SO_(2), DeltaH=-71` Kcal
What is `DeltaH_(f)` of `H_(2)S`

A

2.7 Kcal

B

`-2.7` Kcal

C

5.4 Kcal

D

`-5.4` Kcal

Text Solution

Verified by Experts

The correct Answer is:
B
`H_(2)+S rarr H_(2)S`
`DeltaH=H_(R)-H_(P)`
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