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