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Heat of combustion of C(2)H(4) is -337 k...

Heat of combustion of `C_(2)H_(4)` is `-337` kCal. If 5.6 lit `O_(2)` is used at STP, in the combustion heat liberated is _____ kCal

A

28.08

B

14.04

C

42.06

D

56.16

Text Solution

Verified by Experts

The correct Answer is:
A
`C_(2)H_(5) + 3O_(2) rarr 2CO_(2) + 2h_(2)O`
5.6 lit `= (1)/(4)` moles
3 moles `rarr 337` kcal
1/4 moles `rarr` ? = 28.08 kcal
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