The molar heat capacity of water at constant pressure, C, is `75 JK^(-1) mol^(-1)`. When 1.0 kJ of heat is supplied to 100 g water which is free to expand, the increase in temperature of water is :

Options

A. 6.6K
B. 1.2K
C. 2.4K
D. 4.8K

Answer

B

Explanation

Given ` C _ p = 75 JK ^( - 1 ) mol^( - 1 ) `
` n = (100 ) /( 18 ) ` mole, ` Q = 1000 J Delta T = ? `
` Q = nC _ p Delta T rArr Delta T = (1000 xx 18 ) /( 100 xx 75 ) = 2.4 K `