A 2.00-L tank, evacuated and empty, has a mass of 725.6 g. It is filled with butance gas ( C4H10) at 22 celsius to a pressure of 1.78 atm. What is the mass of the tank after it is filled?
Thanks!!
2006-10-19 04:37:37 · 2 個解答 · 發問者 Hiu Tan 1 in 科學 ➔ 化學
By Ideal Gas Law
PV=nRT
(1.78)(2)=n(8.31)(273+22)
3.56=2451.45n
n=1.452X10^(-3)
mass gain
=(0.001452)(12X4+1X100
=0.0842
new mass
=0.7256+0.0842
=0.8098kg
=809.8g
2006-10-19 12:27:17 · answer #1 · answered by KY Wong 2 · 0⤊ 0⤋
Use PV=nRT
But the unit used is not SI
the correct one should be
(1.78)(2) = n(0.08206)(273+22)
If use R = 8.314
the pressure should be in Pa, not atm
the volume should be in m3, not litre
2006-10-20 19:57:57 · answer #2 · answered by ? 7 · 0⤊ 0⤋