Question

A container has a volume of `18 L` and holds `9 mol` of gas. If the container is expanded such that its new volume is `36 L`, how many moles of gas must be injected into the container to maintain a constant temperature and pressure?

Answer 1

Consider,

`PV = nRT`

`=> V_1/n_1 = (RT)/P = V_2/n_2`

`therefore V_1/n_1 = V_2/n_2`

Hence,

`(18"L")/(9"mol") = (36"L")/n_2`

`therefore n_2 approx 18"mol"`

of gas are needed to be equivalent to the conditions in the former condition.