Dryness Fraction

Hi, here is a problem which I've started to solve:

A cylinder fitted with a piston has a volume of 0.1 m3 and contains 0.5 kg of steam at 0.4

MPa. Heat is transferred to the steam until the temperature is 300 °C, while the pressure

remains constant. Determine the heat transfer and work done for this process. Neglect the

change in kinetic and potential energies.

I have found x1 by solving for specific volume and using steam tables for hf and hfg. x1 = 0.4311

Now I used initial conditions to find h1; = 1524.6kJ/kg

How do I find h2? I use the same formula - h2 = x2.hg + (1-x2).hf

but not sure which x2 value to use or which hf & hg values?

Thanks