When water is heated, the temperature eventually reaches a constant value and forms a plateau on the graph. What does the plateau indicate? *   Q3   175 g of water was heated from 15°C to 88°C. How many kilojoules were absorbed by the water? *     Q4   How many kilojoules are required at 0°C to melt an ice cube with a mass of 25 g? *   Q5   How many kilojoules are required to melt 15 g of ice at 0°C, and raise the temperature of the liquid that forms to 85°C? *

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