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Four grams of graphite is burnt in a bom...

Four grams of graphite is burnt in a bomb calorimeter of heat capacity `30 kJ K^(-1)` in excess of oxygen at 1 atmospheric pressure. The temperature rises from 300 to 304 K. What is the enthalpy of combustion of graphite (in `kJ mol^(1)`) ?

A

360

B

1440

C

`-360`

D

`-1440`

Text Solution

Verified by Experts

The correct Answer is:
C
`Delta E = C xx Delta t xx (M)/(m)`
`= 30 kJ K^(-1) xx 4 xx (12)/(4)`
`= 360 kJ mol^(-1)`
`Delta E = -360 kJ mol^(-1)`
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