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6 December, 01:45

How much heat in joules is required to melt an ice cube with a mass of 18.6 g at 0 °C? The Lf for water is 333 J/g.

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  1. 6 December, 02:13
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    The heat energy required, Q = 6193.8 J

    Explanation:

    Given,

    The mass of ice cube, m = 18.6 g

    The heat of fusion of ice, ΔHₓ = 333 J/g

    The heat energy of a substance is equal to the product of the mass and heat of fusion of that substance. It is given by the equation,

    Q = m · ΔHₓ joules

    Substituting the given values in the above equation

    Q = 18.6 g x 333 J/g

    = 6193.8 J

    Hence, the heat required to melt the ice cube is, Q = 6193.8 J
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