CHM 2045C Module Seven Sample Exam

Module Seven Part D: Enthalpy change with Phase Change/Ice Cube Problem 5 points

Phase Change (3 points):

1. Calculate the amount of heat necessary to melt 27.0 grams of ice at 0^oC, if the heat of fusion of ice is 333 J/g.

If I had the same amount of water at 100^oC, calculate the amount of heat required to boil 27.0 grams of water if the heat of vaporization of water is 2256 J/g?

How much heat is required to raise the temperature of the 27 grams of water at 0^oC to 100^oC, if the specific heat of water is 4.184 J/g^oC

Ice Cube Problem (2 points):

If 27.0 grams of ice at 0^oC is added to an insulated cup of water containing 123 grams of water at 50^oC. What will be the final thermodynamic equilibrium temperature of the water/ice mixture assuming no heat is lost to the surroundings?