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The heat evolved in combustion of benzen...

The heat evolved in combustion of benzene is given by the following equation :
`C_(6)H_(6)+15//2O_(2)to3H_(2)O+6CO_(2)` : `DeltaH=-3264.6 kJ`
Which of the following quantities of heat will be evolved when `39g` of benzene are burnt in an open container ?

A

`-816.15 kJ`

B

`-1632.3 kJ`

C

`-6528.2 kJ`

D

`-2848.45 kJ`

Text Solution

Verified by Experts

The correct Answer is:
B
`78g` of benzene on combustion produces heat
`=-3264.6 kJ`
` :. 39g "will produce"=-(3264.6)/(2)`
`=-1632.3 kJ`
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DINESH PUBLICATION-CHEMICAL THERMODYNAMICS AND CHEMICAL ENERGETICS -Exercise
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  10. One mole of an ideal gas expanded freely and isothermally at 300 K fro...

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