Question

The total pressure inside a vessel containing a mixture of neon, argon, and helium gases is 750 kPa. The partial pressure of neon is 230 kPa, and the partial pressure of argon is 250 kPa. What is the partial pressure of helium?

Answer 1

270 kPa is the partial pressure of helium.

Answer 2

Answer: The partial pressure of helium is 270 kPa.

Explanation: According to Dalton's law, the total pressure of a mixture of gases is the sum of individual pressures exerted by the constituent gases.

`p_(total)=p_A+p_B+p_C`

Thus
`p_(total)=p_(Ne)+p_(Ar)+p_(He)`

Given:
`p_(total)=750 kPa`

`p_(Ne)=230kPa`

`p_(Ar)=250kPa`

Thus
`750kPa=230kPa+250kPa+p_(He)`

`p_(He)=270kPa`