Calculate the pressure that CCl4 will exert at 21°C if 1.00 mol occupies 18.2 L, assuming that CCl4 obeys the ideal-gas equation; CCl4 obeys the van der Waals equation. (Values for the van der Waals constants are given in this table.) (a) Assume CCl4 obeys the ideal-gas equation. atm (b) Assume CCl4 obeys the van der Waals equation. atm (c) Which would you expect to deviate more from ideal behavior under these conditions, Cl2 or CCl4? Explain.