Deviations from the Ideal-Gas Equation For carbon dioxide gas (CO2), the constants in the van der Waals equation are a = 0.364 j· m3/mol2 and b = 4.27 X 10-5 m3/mol
(a) If 1.00 mol of CO2 gas at 350 K is confined to a volume of 400 cm3, find the pressure of the gas using the ideal-gas equation and the van der Waals equation.
(b) Which equation gives a lower pressure? Why? What is the percentage difference of the van der Waals equation result from the ideal-gas equation result?
(c) The gas is kept at the same temperature as it expands to a volume of 4000cm'. Repeat the calculations of parts (a) and (b).
(d) Explain how your calculations show that the van der Waals equation is equivalent to the ideal-gas equation if n/ V is small.