Enthalpy of formation

2015 AIPMT-II 1 question

1. 1 Thermodynamics
   The heat of combustion of carbon to $CO_2$ is −393.5 kJ/mol. The heat released upon formation of 35.2 g of $CO_2$ from carbon and oxygen gas is:
   A −630 kJ B −3.15 kJ C −315 kJ D +315 kJ
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