1) At standard temperature and pressure (0 C and 1.00 atm ), 1.00 mol of an idea
ID: 590171 • Letter: 1
Question
1) At standard temperature and pressure (0 C and 1.00 atm ), 1.00 mol of an ideal gas occupies a volume of 22.4 L. What volume would the same amount of gas occupy at the same pressure and 60 C ?
2) 12.0 moles of gas are in a 8.00 L tank at 20.8 C . Calculate the difference in pressure between methane and an ideal gas under these conditions. The van der Waals constants for methane are a=2.300L2atm/mol2 and b=0.0430 L/mol.
4)A sample of gas (1.9 mol) is in a fixed volume vessel at 21°C and 0.917 atm. A valve is opened and
more gas is added to the vessel. The new pressure is 1.03 atm and the temperature is now 26°C. How
many moles of gas are now in the vessel?
Explanation / Answer
1)
we have:
V1 = 22.4 L
T1 = 0.0 oC
= (0.0+273) K
= 273 K
T2 = 60.0 oC
= (60.0+273) K
= 333 K
we have below equation to be used:
V1/T1 = V2/T2
22.4 L / 273.0 K = V2 / 333.0 K
V2 = 27.3 L
Answer: 27.3 L
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