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  4. Enthalpy of combustion of C (graphite) is -393.3 kJ mol-1 then for producing 39.3 kJ of heat the amount of carbon required is

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Q. Enthalpy of combustion of C (graphite) is $-393.3\, kJ\, mol^{-1}$ then for producing 39.3 kJ of heat the amount of carbon required is

Thermodynamics

Solution:

12 g of graphite produced heat = 393.3 kJ
$\therefore $ 39.3 kJ of heat is produced from
graphite = 1.2 g