Answer to Question #84916 in General Chemistry for klayne

Question

An open vessel contains 450g of ice at -15°C.Heat is supplied to the vessel at a constant rate of 1,800 calories/minute.(Neglect the mass and heat effect of the vessel.Assume no heat exchange with the surroundings.)
a.After how many minutes will the ice start to melt?
b.After how many minutes will the temperature start to rise from 0°C
c.Calculate the time required for the ice to be converted to steam at 100°C?
NOTE:specific heat: ice-0.5cal/g-C°
Water-1.0cal/g-C°
steam-0.5 cal/g-C°
Hv=540 cal/g
Hf=80cal/g