posted by Martha .
How much energy (in kcal) is needed to convert 53.2 g of water at 55.0 C to steam at 100.0 C
q1 = energy to raise T from 55C to 100 C.
q1 = mass x specific heat x (Tfinal-Tinitial).
q2 = energy to vaporize all of the water.
q2 = mass x deltaHvap.
total heat = q1 + q2