22. Of the statements below, which one can best explain why CH4 is a gas at STP, while C8H18 is a liquid and
C20H42 is a solid?
(A) C20H42 has the greatest ionic interaction between its molecules.
(B) C20H42 has a greater amount of hydrogen bonding than CH4 or C8H18.
(C) There is more dipole-dipole interaction between molecules of greater mass.
(D) There are more Van der Waals (dispersion) forces between nonpolar molecules that are greater in mass.
23-25. An ideal gas expands to the vacuum isothermally and irreversibly.