Question

Define each of the following: The molar heat of fusion of water a. met Imol of a The molar heat of fusion of water is = .....0.2...... KJ/mole What is the heat of fusion of water in kJ/g? 6.02 kJ/mol What is the heat of fusion in J/g? 6002 kJ/mol :) molig e. What is the heat of fusion in cal/g? f. The molar heat of vaporization of water فه The molar heat of evaporation of water is = .... What is the heat of vaporization in kJ/g?

Answer 1

a. Heat needed to melt 1 mol of ice to liquid water at 273 K

b. 6.02 KJ/mol

c. 1 mol of water = 18 g

Heat of fusion = molar heat of fusion / molar mass = 6.02 / 18 = 0.334 KJ/g

d. Heat of fusion in J / g = KJ / g * 1000 = 334 J / g

e. 1 cal = 4.184 J

Heat of fusion in cal / g = heat of fusion in J/g / 4.184 = 79.83 cal / g

f. 40.7 KJ / mol

g. 40.7 KJ/ mol

h. Heat of vaporisation in KJ / g = 40.7 / 18 = 2.26 KJ / g