what was the initial pressure?

Question

The temperature of 10 liters of an ideal gas was increased from 600 to 800 Kelvins.  If the volume remained constant and the final pressure was 30 atmospheres, what was the initial pressure?

 

Answer 1

If the amount of gas is constant,

 

P₁V₁/T₁ = P₂V₂/T₂

 

V₁ = V₂ ⇒

 

P₁/T₁ = P₂/T₂

 

P₁ = (T₁/T₂)P₂ = (600/800) (30 atm) = ? atm