Question

CHEMISTRY-IB The molar heat capacity of water at constant pressure, C, is 75 JK-' mol-!. When 1.OKJ of heat is supplied to 100g of water which is free to expand, the increase in temperature of water is 1) 1.2K 2) 2.4K 3) 4.8K 4) 6.6K



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Answer 1

Explanation:

The relationship between the heat supplied, molar heat capacity at constant volume and the temperature change is q=m⋅CpΔT

q=1kJ=1000J

Number of moles =m=molecularweightmass=18100

Substitute values in the above expression.

1000=18100×75×ΔT

Hence, the temperature change is 2.4 K