how much ice at 0 degrees Celsius must be added to a liter of water at 100 degrees celsius so as to end up with all liquid at room temperature?

Question

mrnood · Answer

OK - you've done a number of these type - all the same.

This one has a little extra - the ICE at 0deg requires energy to turn to WATER at 0 deg (the heat of fusion of ice)

So you need to look at the total energy gained by the ice = total energy lost by the water,

The energy lost by one material = energy gained by the other

Just remember that you need to work with the MASS of the materials (because the values for c are given in J/KgC)