Question

A container has a volume of `42 L` and holds `12 mol` of gas. If the container is compressed such that its new volume is `15 L`, how many moles of gas must be released to maintain a constant temperature and pressure?

Answer 1

The number of moles to be released is `=7.71mol`

Explanation:

Apply Avogadro's Law

`V_1/n_1=V_2/n_2`

The initial volume is `V_1=42L`

The initial number of moles `n_1=12mol`

The final volume is `V_2=15L`

The final number of moles is

`n_2=V_2/V_1*n_1`

`=15/42*12=4.29mol`

Number of moles to be released is `=12-4.29=7.71 mol`