Calculating Pressure

Question

Calculate the pressure, in atmospheres, required to compress a sample of helium gas from 

23.7 L

 (at 

1.00 atm

) to 

2.17 L

 at constant temperature.

 

Answer 1

Since this is a constant temperature process, you can use Boyle's law:

P₁V₁ = P₂V₂ ⇒

P₂ = (V₁/V₂) P₁

You know P₁, V₁, and V₂. Plug in the numbers and get P₂.