How much heat is given up when 20 g of steam at 100 deg C is condensed and cooled to 20 deg.C?

Answer 1

q1 = heat lost in condensing steam
q1 = mass steam x heat vaporization

q2 = heat lost in cooling from 100 C to 20 C.
q2 = mass water x specific heat water x (Tfinal-Tinitial)

Total Q = q1 + q2.

Answer 2

Total Q= -160.5 cal