Suppose 1.00 kg of water at 10.0C is mixed with 1.00 kg of water at 30.0C at

Question:

Suppose 1.00 kg of water at 10.0°C is mixed with 1.00 kg of water at 30.0°C at constant pressure. When the mixture has reached equilibrium,
(a) What is the final temperature?
(b) Take cP = 4.19 kJ/kg K for water and show that the entropy of the system increases by