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07/10/2020 12:07 pm
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The molar heat capacity of water at constant pressure is 75 JK-1 mol-1. When 1kJ of heat is supplied to 100 g of water, which is free to expand, the increase in temperature of water is
(a) 6.6 K
(b) 1.2 K
(c) 2.4 K
(d) 4.8 K
1 Answer
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07/10/2020 12:11 pm
(c) 2.4 K
Explanation:
Given CP = 75 JK-1 mol-1
n = 100/18 mole, Q = 1000 J, ΔT = ?
Q = nCPΔT => ΔT = (1000 x 18)/(100 x 75)
= 2.4 K