Question

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`

Answer 1

Correct Answer - B
`78g` of benzene on combustion produces heat
`=-3264.6 kJ`
` :. 39g "will produce"=-(3264.6)/(2)`
`=-1632.3 kJ`