How much heat (in ) is evolved in converting 1.00 of steam at 150.0 to ice at -55.0? The heat capacity of steam is 2.01 and of ice is 2.09 .

Answer 1

see other post.

Answer 2

In the atmosphere, the partial pressure of water is much lower than 1atm, therefore gaseous water can exist at temperatures much lower than 100 degrees C. It takes 169,500 joules of heat to change 5.00g of ice at-15c to liquid water at 10.0c