How much heat is necessary to vaporize 500 g of water at its boiling point?

1 Answer
Nov 22, 2015

Answer:

It depends on what temperature the water is starting at.

Explanation:

If the water is in solid form it would go through 2 phase changes. That equation is:

#q=mDeltaH_f#

The #DeltaH_f# should be given to you or easily accessible.

However, when calculating the amount of heat necessary to heat to a certain temperature you need the initial temperature. That equation looks like this:

#q=mC_sDeltaT#

We're lacking some information in the question. Get that temperature information and we can figure it out.