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4 March, 17:36

Calculate the energy needed to heat 4 kg of water from 25 degrees c to 45 degrees c

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  1. 4 March, 21:35
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    1 cal/g °C) x (4000 g) x (45 - 25) °C = 80000 cal = 80 kcal

    So answer (a)

    80
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