Which of the following Substances would have the highest vapor pressure at 298 K?
A) propanol (b. p.= 97 °C)
B) acetone (b. p.=56°C)
C) benzene (b. p. = 80°C)
D) chloroform (b. p. = 61°C)

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?