1.

The molar heat of vaporisation for water is 9.72 kcal mol^(-1). The amount of heat change when 45 g of water condense is :

Answer»

437.4 KCAL
24.3 kcal
243 kcal
3.89 kcal

Solution :HEAT of CONDENSATION of 18 g of WATER = 9.72 kcal
Heat of condensation of 45 g of water `= (9.72 xx 45)/(18) = 24.3 kcal`


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