EXAMPLE 9.5 Predicting Change in Pressure with Temperature A can of hair spray is used until it is empty except for the propellant, isobutane gas. (a) On the can is the warning "Store only at temperatures below 120 F (48.8 "C). Do not incinerate." Why? (b) The gas in the can is initially at 24 C and 360 kPa, and the can has a volume of 350 mL. If the can is left in a car that reaches 50 C on a hot day, what is the new pressure in the can? Check Your Learning A sample of nitrogen, N2, occupies 45.0 mL at 27 C and 600 torr. What pressure will it have if cooled to -73 "C while the volume remains constant