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Calculate the amount of heat that must be supplied to raise the temperature of 2 kg of water from 25^(@)C to its boiling point at one atmospheric pressure. The average specific heat of water in the range 25 - 100^(@)C is 4.184 JK^(-1) g^(-1). |
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Answer» 628 KJ `m = 2000g, Delta T = 100 - 25 = 75^(@)`, `C_(s) = 4.184 JK^(-1) g^(-1)` Heat required = `2000 x 4.184 xx 75` `= 6.28 xx 10^(5) J` or= 628 kJ |
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