Enthalpy of combustion of carbon is -393.5 k j mol^-1.calculate the amount of heat released upon formation of35.2 gm of CO2 from carbon and dioxygen gas.

Enthalpy of combustion of carbon , del_cH = -393.5 kJ/mol
Amount of CO₂ = 35.2gm
C + O₂ ------------> CO₂
no. of moles = Mass/ Molar mass = 35.2/44 = 0.8 moles
thus heat released will be = -393.5 * 0.8 = -314.8 kj
Thanks & Regards
Aarti Gupta
askiitians Faculty