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17 March, 02:09

How much energy (in kilojoules) is required to melt 160 g of ice and raise the temperature to 77°C

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  1. 17 March, 02:29
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    Given:

    Mass of ice, m = 160 g

    Initial temperature of ice T1 = 0 c

    Final temperature, T2 = 77 C

    To determine:

    The heat required to melt ice

    Explanation:

    The heat (Q) required is given as:

    Q = Heat of fusion of ice + Heat required to raise the temperature of water

    Q = mΔHfusion + mcΔT

    Now, ΔH (fusion of ice) = 333.55 J/g

    specific heat of water, c = 4.18 J/gC

    Q = 160 g * 333.55 J. g-1 + 160 g * 4.18 J/gC * (77-0) C

    Q = 53368 J + 51498 J = 104866 J

    Ans: Heat required = 104.87 kJ
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