Amass of m = 1 kg of an ideal gas (gas constant r= 278 j/kgk) undergoes two polytropic processes. during the first process temperature increases from 27 0c to 237 0c and volume decreases from 1 m3 to 0.3 m3. during the second process temperature increases to 473 0c and volume is constant. the isentropic exponent of the gas is 1.4. determine (a) polytropic exponents (b) missing properties of the gas (c) heat and work of the first process and (d) draw the processes in p-v diagram

A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.