The standard heat of formation () of ethane (in kJ/mol), if the heat of combustion of ethane, hydrogen and graphite are , and , respectively is .

Question

The standard heat of formation () of ethane (in kJ/mol), if the heat of combustion of ethane, hydrogen and graphite are ,  and , respectively is .

Canvas Classes · Accepted Answer

Strategy:
 Apply Hess's Law using combustion enthalpies: .

Step 1: Calculation

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