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Physics: Change of State

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1. How much heat must be absorbed by 25g of ice at 0°C to change it to water without a change in temperature?

Answer = 2.0kcal

2. A glass weighing 25g contains 75g of water at 27°C. how much ice will be needed to bring the temperature to 5°C?

Answer = 20.71g

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1. The formula for phase change is:
Q = mL
where L is the latent heat of fusion of water = 334 J/g
Q = 25(334)
Q = 8350 J
Since 1 ...

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