What is the new pressure of the gas in the ball

Question

A gas at STP fills a soft rubber ball to a volume of 6 L. If the ball is heated to 47 0C, the volume of the ball increases to 8 L.

Answer 1

P₁V₁/T₁ = P2V2/T₂

STP is 1 atm and 273K (use temperature in K for gas problems)

P₂ = P₁V₁T₂ / T₁V₂ = 1 atm x 6 L x (47 + 273) /273 x 8 L = 0.879 atm = 0.9 atm (with correct number of significant figures)