A pressurised air tank supplies compressed air to an air engine. When the air engine is not running the absolute pressure in the tank is 300 bar and the temperature of the air is 60°C.
(a) The temperature of the air in the high pressure air tank when the air engine starts and the absolute pressure in the tank drops to 270 bar. Volume remains constant.
(b) The mass of air in the pressurised air tank using the temperature and pressure from part 1 (a).
M = pV / RT [/B]
p = 270
V = 450
R = 8.314
T = 299.7
The Attempt at a Solution
(a) is fine just need help with (b)
I found the temperature to be 26.7 for the answer to (a) and added 273 to covert into kelvins (299.7)
270 x 450 / 8.314 x 299.7 = 4,379,787 which seems way too high.
How do I convert this into a 3 figure answer from mol mass to j/kgk or can the mass be that high?