A substance melts at 50°C and boils (normal) at 350°C. Its enthalpy of fusion is 20 cal/g, enthalpy of vaporization is 60 cal/g and specific heat of the liquid is 0.30 cal/g-K. The heat required (in c

Question

A substance melts at 50°C and boils (normal) at 350°C. Its enthalpy of fusion is 20 cal/g, enthalpy of vaporization is 60 cal/g and specific heat of the liquid is 0.30 cal/g-K. The heat required (in cal) to convert 20 g of the substance from solid at 50°C to vapour at 350°C is

Answer:

3400.00

Solution:

Fusion: 20×20 = 400 cal. Heating liquid: 20×0.30×300 = 1800 cal. Vaporization: 20×60 = 1200 cal. Total = 3400 cal. Ans = 3400.

TestHub · Accepted Answer

Fusion: 20×20 = 400 cal. Heating liquid: 20×0.30×300 = 1800 cal. Vaporization: 20×60 = 1200 cal. Total = 3400 cal. Ans = 3400.

Chemistry - Thermodynamics - I Question with Solution | TestHub

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