Problem 7 A 1-m rigid tank contains 100 kg R-134a at a temperature of 16 C. A valve on top of the tank is opened, and saturated vapor is allowed to escape through a throttle to a collector system at 100 kPa. During the process the temperature inside the tank remains at 16 C by heat transfer from the 20 C surroundings. The valve is closed when no more liquid remains inside the tank. Calculate the heat transfer to the tank and total entropy generation in the process. *Note that it does not matter if you include the throttle with the tank in your energy balance, but the throttle must be considered part of the system along with the tank in your entropy balance