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The energy required to melt 20 g of water (ice) starting at 0° C is 6680 J.
<h3>What is Heat?</h3>
Heat is a form of energy that is possessed by a system by virtue of its temperature. Its unit is Joule.
Enthalpy is the amount of the heat content of a system.
<h3>What is Heat Capacity?</h3>It is the amount of heat required to increase the temperature of a system by 1° C. It is an extensive property. Its unit is J/°C
Heat Capacity is given by
where q = heat required
= change in temperature
Enthalpy of Fusion is the enthalpy change when 1 mole of a solid substance changes into its liquid state at its melting point.
Here, water in solid form (ice) melts into liquid form at 0°C
We know,
where m = given mass
q = heat required
q = 334 x 20 g
= 6680 J
Thus, the heat required to melt 20 g of water at 0°C is 6680 J
Learn more about Enthalpy:
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