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The heat of combustion of carbon to CO(2...

The heat of combustion of carbon to `CO_(2)` is `-393.5` kJ/mol. The heat released upon formation of 35.2 g of `CO_(2)` from carbon and oxygen gas is

A

`+ 315kJ`

B

`-630kJ`

C

`-3.15 kJ`

D

`-315kJ`

Text Solution

Verified by Experts

The correct Answer is:
D
`C+ O_(2) rarr underset(44g) (CO_(2)), DeltaH=- 393.5 kJ mol^(-1)`
For formation of44g , `DeltaH = -393.5 kJ`
`:. `For formation of`35.2 g `of`CO_(2)`
`DeltaH= - ( 393.5)/( 544) xx35.2 =- 314.8 =-315 kJ`
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