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प्रश्न
Calculate the amount of heat given out while converting 100 g of water at 50°C into ice at -5°C. (refer Q.9 for data).
संख्यात्मक
उत्तर
Amount of heat given out while converting water from 50°C to 0°C
= m x c x θ
= 100 x 4.2 x 50
= 21000 J
Amount of heat given out while converting water at 0°C to ice at 0°C = mL
= 100 x 330
= 33000 J
Amount of heat given out while converting ice from 0°C to 50°C
= 100 x 2.1 x 5
= 10500 J
Total heat required during the process = 64500 J
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