Chapter 11, Problem 11.29QP

Interpretation Introduction

Interpretation: Why helium weather balloon expands as it rises in air has to be explained.

Concept Introduction:

Boyle’s law states that the volume of a sample of a gas at constant temperature is inversely proportional to pressure

$\begin{array}{l}\text{V=}{\text{k}}_{\text{1}}\frac{\text{1}}{\text{P}}\text{(or)}\\ {\text{P}}_{\text{1}}{\text{V}}_{\text{1}}{\text{= P}}_{\text{2}}{\text{V}}_{\text{2}}\left(\text{at constant temperature}\right)\end{array}$

The temperature can't remain steady other than; the effect of the decreasing pressure outside is superior to the effect of the falling temperature of the Helium.