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Given C+2S rarr CS(2), DeltaHf^(@)=+11...

Given
`C+2S rarr CS_(2), DeltaHf^(@)=+117.0 kJ mol^(-1)`
`C+O_(2) rarr CO_(2), DeltaHf^(@)=-393.0 kJ mol^(-1)`
`S+O_(2) rarr SO_(2), DeltaHf^(@)=-297.0 kJ mol^(-1)`
The heat of combustion of
`CS_(2)+3O_(2) rarr CO_(2)+2SO_(2)` is

A

`-807" kJ mol"^-1`

B

`-1104" kJ mol"^-1`

C

`+ 1104" kJ mo1"^-1 `

D

`+ 807" kJ mol"-1 `

Text Solution

Verified by Experts

The correct Answer is:
B
`2 xx Eqn. (iii) Eqn. (ii) - Eqn. (i) ` gives
`Delta H = (2 xx -297) +(- 393 )- 117` = - 1104 kJ.
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NIKITA PUBLICATION-Chemical Thermodynamics & Energetics-QUESTION FROM COMPETITIVE EXAM
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  2. For an endothermic reaction where DeltaH represent the enthalpy of rea...

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