Question

help...
krypton at 500 torr in a 250 ml container and helium at 950 torr in a 450 ml flask both at the same temperature are mixed by opening a stop wingspan in a narrow tube connecting the containers . calculate the total final pressure.
a. 790 torr
b. 670 torr

Answer 1

you already are given the pressures of the two. P total = p1+p2

Answer 2

Remember, if you mix the two containers, the volume changes too. Find the partial pressures and take the sum. So:

(950torr x 450mL)/700mL = about 611
(500torr x 250mL)/700mL = about 179
611 + 179 = 790torr

should be a.

Answer 3

tnx a lot.. :)