The Student Room Group

Thermochemistry Problem - Entropy

Ok so literally I've bee stuck on this question for hours and have no idea where to go.

Steam at a quality of 90%, is expanded in a cylinder at a constant pressure of 800 kPa by adding 2000 kJ/kg of heat. Compute the entropy increase.

So far I have, using steam tables, the initial enthalpy and the initial entropy. Could anybody give me a hand to where to go from here?

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