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The heat of combusion of benzene in a bo...

The heat of combusion of benzene in a bomb calorimeter (i.e constant volume) was found to be `3263.9kJ mo1^(-1)` at `25^(@)C` Calculate the heat of combustion of benzene at constan pressure .

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To calculate the heat of combustion of benzene at constant pressure (ΔH) from the heat of combustion at constant volume (ΔU), we can use the following relationship: \[ \Delta H = \Delta U + \Delta n_g \cdot R \cdot T \] Where: - ΔH = heat of combustion at constant pressure ...
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The heat produced by the combustion of 2.0g of benzene in a bomb calorimeter was found to be 123.6 kJ at 25^(@)C . Calculate the enthalpy of combustion of benzene at 25^(@)C .

The combustion of benzene (l) gives CO_(2)(g) and H_(2)O(l) . Given that heat of combustion of benzene at constant volume is –3263.9 kJ mol^(–1) at 25^(@)C , heat of combustion (in kJ mol^(–1) ) of benzene at constant pressure will be (R = 8.314 JK–1 mol–1)

Knowledge Check

  • The combustion of benzene(/) gives CO_2(g) and H_2O(l) Given that heat of combustion of benzene at constant volume is -3263.9 kJ mol^(-1) at 25^@C , heat of combustion (in kJ mol^(-1) ) of benzene at constant pressure will be (R = 8.314 JK^(-1) mol^(-1))

    A
    `4152.6`
    B
    `-452.46`
    C
    `3260`
    D
    `-3267.6`

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    The heat liberated on complete combustion of 7.8g benzene is 327kJ . This heat has been measured at constant volume and at 27^(@)C . Calculate heat of combustion of benzene at constant pressure at 27^(@)C . (R=8.3 J mol^(-1)K^(-1))

    The heat liberated on complete combustion of 7.8g benzene is 327kJ . This heat has been measured at constant volume and at 27^(@)C . Calculate heat of combustion of benzene at constant pressure at 27^(@)C . (R=8.3 J mol^(-1)K^(-1))

    When 2 g of benzene are burnt in a bomb calorimeter, the heat produced is 83.6 kJ at 298 K. Calculate the enthalpy of combustion of benzene.

    0.16 g of methane was subjected to combustion at 27°C in a bomb calorimeter. The temperature of the calorimeter system (including water) was found to rise by 0.5°C. Calculate the heat of combustion of methane (i) at constant volume and (ii) at constant pressure. The thermal capacity of the calorimeter system is 17.7 kJ K^(-1)(R = 8.314 JK^(-1) mol^(-1)) .

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