Carbon dioxide behaves almost ideally at 5 atm and 300 K
CHEMISTRY · Single correct · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures
Problem
Carbon dioxide behaves almost ideally at 5 atm and 300 K. If the pressure is increased to 200 atm at the same temperature, how will the measured molar volume compare with the value predicted by the ideal gas law, and what is the primary reason?
(a) It will be larger, primarily because repulsive forces between molecules dominate at high pressure.
(b) It will be unchanged, because pressure and volume are inversely proportional for any gas.
(c) It will be smaller, primarily because attractive forces between molecules reduce the volume.
(d) It will be smaller, primarily because the finite size of the molecules leaves less free space for the gas.