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31 May, 02:25

A hydrocarbon sample was burned in a bomb calorimeter. The temperature of the calorimeter and the 1.00 kg of water rose from 20.45°C to 23.65°C. The heat capacity of the calorimeter, excluding the water, is 2.21 kJ/°C. Using this information, determine the heat released by the combustion.

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  1. 31 May, 03:45
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    The heat released by the combustion is 20,47 kJ

    Explanation:

    Bomb calorimeter is an instrument used to measure the heat of a reaction. The formula is:

    Q = C*m*ΔT + Cc*ΔT

    Where:

    Q is the heat released

    C is specific heat of water (4,186kJ/kg°C)

    m is mass of water (1,00kg)

    ΔT is temperature change (23,65°C - 20,45°C)

    And Cc is heat capacity of the calorimeter (2,21kJ/°C)

    Replacing these values the heat released by the combustion is:

    Q = 20,47 kJ
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