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The standard heat of combustion of propa...

The standard heat of combustion of propane is `-2220.1KJ mol^(-1)` . The standard heat of vaporisation of liquid water is `44.0KJ mol^(-1)` . What is `DeltaH^(@)` of
`C_(3)H_(8)(g)+5O_(2)(g)rarr3CO_(2)(g)+4H_(2)O(g)`

A

`-2220.1KJ`

B

`-2044.1KJ`

C

`-2396.1KJ`

D

`-2176.1KJ`

Text Solution

Verified by Experts

The correct Answer is:
C
`DeltaH_("vap")^(@)` of `H_(2)O=44.0KJmol^(-1)`
`:.DeltaH_("vap")^(@)` of 4 mol `H_(2)O=176.0KJ`
`:. DeltaH_("Rxn")=deltaH_("comb")^(@)(C_(3))H_(18))+DeltaH_("vap")^(@)(4H_(2)O)`
`=-2220.1+176.0`
`=-2044.1KJ`
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