Calculate the change in the canister pressure when the outside temperature changes from 72 ∘f to 80 ∘

f.

The canister is wrapped in a pair of thermal underwear, and is

being stored inside the house, in a locked insulated cabinet, in

a room where the temperature is maintained at a balmy 72°F.

So the outside temperature, and changes in that value, have

no effect whatsoever on the canister, its contents, or its pressure.

This answer completely conforms to all information given in the question.