100-kg of r-134a at 200 kpa are contained in a pistoncylinder device whose volume is 12.322 m3. the piston is now moved until the volume is one-half its original size. this is done such that the pressure of the r-134a does not change. determine the final temperature and the change in the total internal energy of the r-134a.

Consider a 1.2 meter high and 2 meter wide glass window whose thickness is 6 mm and thermal conductivity is 0.78 w/m °c. the room temperature is maintained at 24 °c, while the outdoor temperature is -5 °c. the convective heat transfer coefficients on the inner and outer surfaces of the window are 10 w/m2 °c and 25 w/m2 °c respectively. (a) draw the thermal resistance network, etermine the steady rate of heat transfer t e glass window (c) determine the temperature of the inner surface of the window