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 0oC, if the heat of fusion of ice is 333 J/g.

 

 

 

 If I had the same amount of water at 100oC, 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 0oC to 100oC, if the specific heat of water is 4.184 J/goC

 

 

 

 

 

 

 

 

Ice Cube Problem (2 points):

 

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