Question

Step 2: How much energy does it take to completely vaporize the boiling water? This is where you use AH because it is a phase change. Do you use AH or AH? Vaporization means the water is vaporizing (or condensing) where fusion means the water is freezing (or melting).

Answer 1

Assuming water boils at 100 degree Celsius, when we provide more heat water will get converted into steam (vapor form)

So to find the heat required

Q = m* Hvap

Q= amount of heated added

m= mass of water

Hvap = latent heat of vaporization

We use latent heat of vaporization because water is being converted into steam , if it had been converted into ice we would have used latent heat of fusion.

But in this case we will always use latent heat of vaporization.