A gas sample occupies a volume of 400.0ml at 298.15k at costant pressure. what is the final temperature when the volume occupied decreased by 39.0

2 answers

A gas sample occupies a volume of 400.0ml at 298.15k at costant pressure. what is the final temperature when the volume occupied decreased by 39.0?
PV=kT
Since P is constant,

V/T = k/P is constant

if V is decreased by a factor of 361/400, T must decrease by the same factor to have the quotient remain constant.

298.15 * 361/400 = 269.08K

It seems odd that the temperature goes down as the gas is squeezed, but remember that we are keeping a constant pressure.