If 5.40 kcal of heat is added to 1.00 kg of water at 100⁰C, how much steam at 100⁰C is produced? Show all calculations leading to an answer.

Is this how you would do this?
Q= m*Hvap
Q= m* 5.40
Q=100*5.40
Steam = 540 kg of steam?

2 answers

You need to use units.

Hv=2260kj/kgwater=2260kj*1kcal/4.18kj*1/kgwater
Hv= 540kcal/kgwater.

Q=m*Hv

mass=Q/Hv= 5.40kg/(540kcal/kgwater)
= .01kg=100grams water
0.01kg = 10.0 grams water.