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JEE Main & Advanced JEE Main Paper Phase-I (Held on 07-1-2020 Evening)

  • question_answer
    The standard heat of formation \[({{\Delta }_{f}}H_{298}^{0})\] ethane (in kJ/mol), if the heat of combustion of ethane, hydrogen and graphite are -1560, -393.5 and -286 kJ/mol, respectively is_______.         [JEE MAIN Held on 07-01-2020 Evening]

    Answer:

    -192.5


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