- #1

escape_velocity

- 44

- 2

## Homework Statement

Given 2 tanks A and B.

Tank A has a volume of 2m

^{3}and contains air at pressure 1 bar absolute

Tank B has a volume of 1m

^{3}and contains air.

Tank A and B and interconnect with a pipe and has a stopcock and is currently closed.

What is the pressure or air that would be needed in Tank B such that after the stopcock is opened and pressures in both tanks have equalized the pressure in both tanks now is 0.8 bar.

## Homework Equations

Can the equation

Code:

`P1V1 = P2V2`

I'm a bit wary about this since boyles law applies to a

since this problem involves 2 cyclinders can we consider the gas to befixed amount of gas

a fixed amount

## The Attempt at a Solution

P1 = ?

V1 = 1m

^{3}

P2 = 0.8bar

V2 = 2 + 1 = 3m

^{3}

P1 = (0.8 * 3) / 1

P1 = 2.4bar

Which seems to be incorrect, intuitively I would have said that the pressure in the smaller tank (tank B) should have been below 1 bar to get the equalization pressure to 0.8 bar.

Where am I going wrong?