Posted by david on .
calculate the pressure exerted by 1.00 moles of CO2 confined in a volume of 5.00 L at 450. K. Compare the pressure with that predicted by the ideal gas equation.

college chemistry 
DrBob222,
Something must be missing from your post. If you use PV = nRT, that IS the pressure predicted by ideal behavior. Perhaps you are to use the van der Waals equation and compare.