A weather balloon with a volume of 3.40774 L

Question

is released from Earth’s surface at sea level.
What volume will the balloon occupy at an
altitude of 20.0 km, where the air pressure is
10 kPa?
Answer in units of L.

Answer 1

If the temperature at sea level is the same as it is at an altitude of 20.0 km, (it isn't of course) then use P1V2 = P2V2
If the problem gives T at sea level and at 20.0 km, then use
(P1V1/T1) = (P2V2/T2).

Answer 2

thanks but where do i put which number for the formula?

Answer 3

If you're using P1V1 = P2V2, then you can pick and choose but just be consistent. For example, I would use
P1 at sea level an that is 101.325 kPa
V1 = 3.40774 L from the problem.
P2 = 10 kPa at 20.0 km
V2 = ? .Solve for that.

Answer 4

ok thank you. every other website i ask is just full of trolls

Answer 5

I don't have time to be a troll. I'm a retired university professor just trying to help students help themselves.