On a somewhat cool day of 67 F, a 55 gallon drum is two thirds full of a volatile liquid and the lid on the pour spout is off. the barometer shows 28.8 inches of mercury. an employee sees the drum open and caps the lid tightly. a forklift accidentally hits but does not puncture the drum or force the cap off, it does dent the drum reducing its volume by 25%. the contents remain in thermal equilibrium with the surroundings. assuming that the total number of moles of the liquid in the gas phase above the liquid does not change as a result of the accident, predict the new pressure of the gas above the liquid. what if on the other hand the pressure of the gas above the liquid does not change as a result of the collision - explain what must happen in order for this to occur. calculate the total quantity (in moles) of the liquid in the gas phase before and after the collision.