Final answer:
The molar volume of CO₂ and HCl are slightly less than the ideal 22.4 L/mol due to deviations from ideal gas behavior, likely caused by intermolecular forces and molecular size.
Step-by-step explanation:
The molar volume for CO₂ and HCl are 22.262 L/mol and 22.244 L/mol, respectively, which are slightly less than the ideal molar volume of 22.4 L/mol.
The reason for this discrepancy is that real gases do not always behave ideally, especially at high pressures or low temperatures where the size of the gas molecules and intermolecular forces can no longer be ignored as in the ideal gas law approximation.
In the case of CO₂ and HCl, the small deviations from the ideal molar volume may be the result of such non-ideal interactions. HCl, the chlorine atom has a higher electronegativity than hydrogen, causing a partial negative charge on the chlorine atom and a partial positive charge on the hydrogen atom. These partial charges result in attractions between neighboring HCl molecules, leading to a decrease in molar volume.