Question

If 5.40 kcal of heat is added to 1.00 kg of water at 100C, how much steam at 100C is produced? sHOW ALL CALCULATIONS LEADING TO AN ANSWER. Q=m*Hf 5.4=m*80 m=5.40/80=0.0675kg

Answer 1

You have the wrong formula and wrong data. Hf is heat fusion; you want Hvap. Hf is 80 cal/g; Hvap is 540 cal/g
Q = m*Hvap
Hvap = 540 cal/g