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5. How much thermal energy is needed to change 100 g of ice at -20 °C into steam at 110 °C? a) Draw a
heating diagram for this change.
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A piece of ice with a mass of 120 g is transferred directly from the freezer at a temperature of 8°C to a polystyrene cup containing 300 g of water at 85°C. Calculate the final temperature of the water. Ignore any heat lost to the cup and its surroundings. 14.