Two vessels, A and B, each of volume 3 m3may be connected by a tube of negligible volume. Vessel a contains air at 0.7 MPa, 95 ° C, while vessel B contains air at 0.35 MPa, 205°C. Find the change of entropy when A is connected to B by working from the first principles and assuming the mixing to be complete and adiabatic. For air take the relations as given in Example 7.8.