Consider 0.8 grams of air (which may be assumed to be an ideal gas) at 295 K and 1.5 bar trapped in a rigid tank. An electrical heater is operated for 30 seconds. During this time the voltage across the heater is 12 V and 0.6 amps pass through the resistance element. During this process, 126 J of energy is lost via heat transfer through the tank walls.
a. Assuming the specific heats of air are constant (at the 300 K values) determine the final temperature of the air.
b. Determine the final pressure in the tank.