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Heat of formation off SO(2) is -298 kJ. ...

Heat of formation off `SO_(2)` is -298 kJ. What is the heat of combustion of 4 g of S?

A

`+37kJ`

B

`-37.25kJ`

C

`+298kJ`

D

18.6 kJ

Text Solution

Verified by Experts

The correct Answer is:
B
`S+O_(2) to SO_(2),DeltaH=-298kJ`
heat of formation of `SO_(2)` iis also the heat of combustion of sulphur.
Heat of cumbustion of 32 g of S=-298 kJ
therefore, heat of combustion of 4 g of
`S=((-298)xx4)/(32)=37.25kJ`
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