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Calculate the enthalpy of hydrogenation ...

Calculate the enthalpy of hydrogenation of ethylene, given that the enthalpy of combustion of ethylene, hydrogen and ethane are -1410.0,-286.2 and -1560.6 kJ `mol^(-1)` respectively at 298 K

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To calculate the enthalpy of hydrogenation of ethylene (C2H4), we can use the enthalpy values of combustion provided for ethylene, hydrogen, and ethane. The reaction for the hydrogenation of ethylene is: \[ \text{C}_2\text{H}_4 + \text{H}_2 \rightarrow \text{C}_2\text{H}_6 \] ### Step-by-Step Solution: 1. **Write the combustion reactions and their enthalpy changes:** - **Combustion of Ethylene (C2H4):** ...
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Calculate the enthalpy of formation of methane given that the enthalpies of combustion of methane, graphite and hydrogen are 890.2 KJ, 393.4 KJ and 285.7 KJ mol^(-1) respectively

Knowledge Check

  • Calculate the enthalpy of hydrogenation of C_2 H_(4(g)) , given that the enthalpy of formation of ethane and ethylene as -30.2 kcal and +12.5 kcal respectively.

    A
    `-4.8`kcal
    B
    `+7.7`kcal
    C
    `-42.7`kcal
    D
    `-7.7`kcal

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