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JEE Main & Advanced Chemistry Thermodynamics / रासायनिक उष्मागतिकी Question Bank Numerical Value Type Question - Chemical Energetic

  • question_answer
    Calculate the enthalpy of the reaction. \[C{{H}_{2}}\,\,=\,\,C{{H}_{2}}\,\,\left( g \right)\,\,+\,\,{{H}_{2}}\,\,\left( g \right)\,\,\xrightarrow{{}}\,\,C{{H}_{3}}\,\,-\,\,C{{H}_{3\text{ }}}\,\,\left( g \right).\]Bond energies of \[C\,-\,H,\,\,C\,-\,C,\,\,C\,=\,C\]and \[H\,-\,H\]are 99, 83, 147 and 104 kcal respectively.

    Answer:

    -308.70


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