The amount of energy needed to change 25 g of −30°C ice into 0°C liquid water is 8350 J.
Amount of heat required
The amount of heat required to change 25 g of −30°C ice into 0°C liquid water is calculated as follows;
Q = mLf
where;
- m is mass of the ice
- Lf is latent heat of fusion
Q = 25 x 334
Q = 8350
Thus, the amount of energy needed to change 25 g of −30°C ice into 0°C liquid water is 8350 J.
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