KEAM 2015 Physics and Chemistry Paper

The enthalpy of combustion of glucose (mol. wt. =180g∕mol)=−2840kJ/mol
180g glucose gives enthalpy of combustion. =2840kJ∕mol
1g glucose gives enthalpy of combustion =‌

2840

180

So, 0.9 g glucose gives enthalpy of combustion
=‌

2840

180

×0.9
=‌

2840

200

kJ=14.2kJ