If 2 kg of ethyl alcohol were allowed to vaporize how much ice would be formed from 0°C water?

Question

The heat of vaporization of ethyl alcohol is about 200 cal/g. If 2 kg of it were allowed to vaporize in a refrigerator, how many grams of ice would be formed from 0°C water?

Answer 1

Let's see......
200cal/g * 1000g/kg *2kg = 400,000 cal

The latent heat required to turn 0C water to 0C ice is 80cal/g so
400,000 cal/80cal/g = 5000 g or 5 kg of ice.


Doug