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The Ideal Gas Equation








08206cal/mol K1.987J/mol K8.314m3 Pa/mol K8.314L torr/mol K62.36Example:
If we had 1.0 mol of gas at 1.0 atm of pressure at 0C (273.15 K), what would be the volume?
PV = nRT
V = nRT/P
V = (1.0 mol)(0.0821 L atm/mol K)(273 K)/(1.0 atm)
V = 22.41 L
0 C and 1 atm pressure are referred to as the standard temperature and pressure (STP)
The molar volume of an ideal gas (any ideal gas) is 22.4 liters at STP
Example: Nitrate salts (NO3-) when heated can produce nitrites (NO2-) plus oxygen (O2). A sample of potassium nitrate is heated and the O2 gas produced is collected in a 750 ml flask. The pressure of the gas in the flask is 2.8 atmospheres and the temperature is recorded to be 53.6 C.
How many moles of O2 gas were produced?
PV = nRT
n = PV/RT
n = (2.




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