A kilogram of Argon gas( MW= 40 kg/kmol, k=5/3) is in a piston cylinder set-up. Initially, it has pressure of 3OkPa and volume of 0.2m³ and expanded to 20 kPa due to heat transfer. If the process is said to be isovolumic, find initial and fina temperatures.

Consider a balloon contains initially 40 liter of Helium at 105 kPa and 20 oC, The balloonis connected to a supply line of helium through a valve that is opened allowing helium tofurther fill the balloon to 150 kPa such that pressure in the balloon is expressed as: P =750 V0.5– 45, Where P is in kPa and V is m3. Considering Helium as ideal gas:a- Find the mass of Helium entered the balloon if the process is isothermal.b- Find the work done during the process.