Question

.
The molar heat capacity of water at constant pressure is 75
JK-mol-'. When 1.0 kJ of heat is supplied to 100 g of water
which is free to expand, the increases in temperature of water is
(a) 6.6K
(b) 1.2 K
(c) 2.4K
(d) 4.8 K​

Answer 1

No of moles in 100g of water = 100/18

H = 1000J

Cp = 75JK/mole

H = no of moles × Cp × T

1000/75×100/18 = T

1000× 18/75 × 100 = T

T = 2.4K

Ans = c

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