Question

How much heat is required to convert 200. g of 40 degrees C water to steam at 100' degrees C?

Answer 1

You need to provide some data...

Explanation:

We need (i) the specific heat of water in `J*K^-1*g^-1`, and (ii) the enthalpy of vaporization in `J*g^-1` or `J*mol^-1`. We could look these data up, but it is your problem.