12.2: m, kg of water at absolute temperature T, is isobarically and adiabatically mixed with m2 kg of water at absolute temperature T2. Find the change in entropy of the universe. Deduce the expression if the masses of water mixed are equal to m and show that the mixing process is irreversible. Specific heat of water is Sw. Assume, T, > T2. m, kg at T, m,kg at T2 Fig. P. 4.12.2

Helium is contained in a balloon at 0.5 m3, 100 °C inside an evacuated, insulated chamber. The balloon is suddenly punctured, allowing the helium to expand into the chamber with a volume of 5 m3. Treat the helium as an ideal gas. How much entropy is generated per kg of helium? Why does this process generate entropy?

Provide  clear and complete solution as well as diagram.  Air is to be compressed steadily and isentropically from 1 atm to 18 atm by a two stage compressor. Determine the intermediate pressure in kg/cm2.A. 5.61                         C. 6.21B. 4.98                         D. 4.38

Establish the increase of entropy principle.