Power Puff Girls like balloons. They bought a 2.15 L pink balloon at 1.75 atm. When they went outside, the volume changed to 1.32 L. What was the new pressure?
V1 = 2.15 L
P1 = 1.75 atm
V2 = 1.32 L
P2 = unknown
Assume that the temperature remain uncahnged: T1 = T2 = const
Since the temperature and amount of gas remain unchanged, Boyle's law can be used.
Boyle's gas law can be expressed as: P1V1 = P2V2
To find the new pressure, solve the equation for P2:
P2 = P1V1 / V2
P2 = (1.75 atm × 2.15 L) / (1.32 L) = 2.85 atm
P2 = 2.85 atm
Answer: The new pressure was 2.85 atm