The boiling point of benzene is 80ºC. Which pair of samples will have the same average kinetic energy as benzene molecules?
· a sample of liquid benzene at 80ºC and a sample of gaseous benzene at 80ºC
· two samples of gaseous benzene, one at 80ºC and the other at 90ºC
· a sample of liquid benzene at 70ºC and a sample of gaseous benzene at 90ºC
· two samples of liquid benzene, one at 70ºC and the other at 80ºC
