19. How much energy is required to melt 450 g of ice if the Lf=3.33 x 105 1 point J/kg? a. 1498.5 KJ O b. 1.4985 KJ c. 149.85 KJ d. None of the choices 20. How much heat is required to raise the temperature of 0.15 kg of water 1 point from 20 OC to 55 0C. a. 22 kJ O b. 42 KJ c. 45.8 KJ d. None of the choices 21. How much energy is required to convert 3kg of ice at OOC to water at 1 point 300C. O a. 1536 KJ O b. 20 000 kJ c. 1375.74 KJ d. None of the choices22. What is the rate of heat flow through a glass window that is 2 m x 3 m x 'I point 1.4 cm thick if the outside temperature is 220C and the inside temperature is 250C ? K=O.84 st m 0C 0 3.25.32 kw O b.1118 kw 0 0.4.06 kw 0 d. None of the choices