The heat of combustion of ethane gas is kcal/mol

PHYSICS · Subjective · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter

Problem

The heat of combustion of ethane gas is

368

kcal/mol. Assuming that

60\%

of the heat is useful, how many

m^3

of ethane measured at STP must be burnt to supply enough heat to convert

50

kg of water at

10^\circ C

to steam at

100^\circ C

? Specific heat of water is

1

cal/g. Heat of vaporisation of

H_2O

540

cal/g.