Question

2. Your friend sits on a 25.0 L kangaroo ball, squishing the ball so that it is only 17.5

L. What is the pressure inside the ball if the outside air pressure is 100 kPa

(kilopascals)?

Answer 1

143 kPa

Step-by-step explanation:

Step 1: Given data

• Initial volume (V₁): 25.0 L

• Initial pressure (P₁): 100 kPa (the ball is at equilibrium with the surroundings so the internal pressure matches the external pressure)

• Final volume (V₂): 17.5 L

• Final pressure (P₂): ?

Step 2: Calculate the final pressure of the air inside the ball

Assuming ideal behavior, we can calculate the final pressure using Boyle's law.

P₁ × V₁ = P₂ × V₂

P₂ = P₁ × V₁/V₂ = 100 kPa × 25.0 L/17.5 L = 143 kPa