True or False
(a) compression at constant T < Tc yields ideal gas like P vs. V behavior
(b) vapor pressure is temperature-independent during the gas  liquid transition
(c) The ratio PV/mT is the same for all gases in the limit of zero pressure
(d) doubling the absolute T will double the average molecular speed
(e) if we know T, we can predict the average translational energy of a molecule picked at random