A rigid, insulated vessel is divided into two equal-volume compartments connected by a valve. Initially, one compartment con tains 1 m3 of water at 20°C, x = 50%, and the other is evacuated. The valve is opened and the water is allowed to fill the entire volume. For the water, determine the final temperature, in °C, and the amount of entropy produced, in kJ/K.

Solution :

Given

Volume,

Temperature,

From the saturated water table, corresponding to , we get the saturated liquid, vapor specific and the entropy.

Now calculating the initial specific volume

Calculating the initial specific entropy:

So final volume of the vessel is two times bigger as the initial volume

If we interpolate the values from tables between and , we can get final temperature and specific entropy corresponding to value of :

Final temperature,

and

Calculating change in entropy

diy

explanation:

it was a fall down when it happens

explanation: