Question

On combustion of 4 g of methane, 10.46 kJ of
heat is liberated. Heat of combustion of
methane is
a) 83.68 kJ b)- 41.84 kJ c)- 10.46 kJ d) 20.92 kJ​

Answer 1

Answer:

Answer

Correct option is

B

10 Kcal.

Solution:- (B) 10Kcal

Mol. wt. of methane =16gm

Heat liberated during the combustion of 4gm methane =2.5kcal

Heat liberated during the combustion of 16gm methane =

4

2.5

×16=10kcal

Hence the heat of combustion of methane is 10Kcal.