Liquid Freon (CCl2F2) is used as a refrigerant. It is circulated inside the cooling coils of older refrigerators or freezers. As it evaporates, it absorbs heat. How much heat can be removed by 2.00 kg of Freon as it evaporates inside the coils of a refrigerator? The heat of vaporization of Freon is 38.6 g/cal.

Question

Please help!

Amena.S · Accepted Answer

I'm also wondering why no temperature given. I don't understand why it wouldn't be needed. Thanks

DrBob · Answer

Something is wrong. The heat of vaporization is given in units of cal/gram or cal/mol. .

Amena.S · Answer

Oh my apologies! It's 38.6 cal/g

DrBob · Answer

OK. So the heat of vaporization (at whatever temperature that is)is 38.6 cal/gram CH2Cl2. That's why no T is given. How many grams do you have? That's 2 kg or 2,000 grams.
So 38.6 ca/g x 2000 g = ? cal. And you thought this was complicated/