Gas Law Chemistry

Question

A child receives a balloon filled with 34 L of helium from a vendor at an amusement park. The temperature outside is 314 K. What will the volume of the balloon be when the child brings it home to an air-conditioned house at 294 K? Assume that the pressure stays the same.

Answer 1

Use Charle's Law: V₁/T₁ = V₂/T₂

34L / 314 K = V₂ / 294 K

Cross multiply: (34L)(294 K) = (314K)(V₂)

Isolate V₂ = (34L)(294K) / (314K) = V₂

V₂ = 32 L with two sig figs