How much heat (in g ) is evolved in converting 1.00 of steam at 145.0 to ice at -45.0? The heat capacity of steam is 2.01 and of ice is 2.09 .

Answer 1

q1 = heat removed to convert steam at 145 C to steam at 100 C.
q1 = mass x specific heat steam x (Tfinal-Tinitial)-----where Tf is 100 and Ti = 145.

q2 = heat removed to convert steam at 100 to water at 100 C.
q2 = mass steam x heat vaporization

q3 = heat removed to convert water at 100 to water at 0 C.
q3 = mass water x specific heat water x delta T.

q4 = heat removed to convert water at 0 C to ice at 0 C.
q4 = mass x heat fusion water.

q5 = heat removed to convert ice at 0C to -45 C.
q5 = mass ice x specific heat ice x delta T.

Total heat removed (evolved) = q1 + q2 + q3 + q4 + q5

Answer 2

57.6