0.16 g of methane was subjected to combustion at 27^(@)C in a bomb calorimeter. The temperature of Calorimeter system (including water) was found to rise by 0.5^(@)C. Calculate the heat of combustion of methane at (i) constant volume (ii) constant pressure. The thermal capacity of Calorimater system is 17.7" kJ K"^(-1). (R=8.313" J mol"^(-1) K^(-1))

0.16 g of methane was subjected to combustion at 27^(@)C in a bomb cal

1.	0.16 g of methane was subjected to combustion at 27^(@)C in a bomb calorimeter. The temperature of Calorimeter system (including water) was found to rise by 0.5^(@)C. Calculate the heat of combustion of methane at (i) constant volume (ii) constant pressure. The thermal capacity of Calorimater system is 17.7" kJ K"^(-1). (R=8.313" J mol"^(-1) K^(-1))
Answer» Solution :`CH_(4)+2O_(2) rarr CO_(2) +2H_(2)O` Total energy relesed `=17.7xx0.5=8.85` Energy released by one MOLE `CH_(4)=8.85/0.16 xx16=-885" kJ/mol"` `DeltaH=DeltaU+Deltan_(G) RT rArr Deltan_(g) =-1 rArr DeltaH=-889.95" kJ/mol"`