A balloon has volume 175L at 1atm.calculate its volume at 0.80atm if temperature is constant.

Dear Student,

If the temperature is constant, then by Boyles law of gases
 

Boyle's law gives the relation between pressure (p) and volume (V) of a fixed amount of gas. Boyle's law states that at constant temperature, the pressure of a fixed amount (number of moles, n) of a gas is inversely proportional to its volume.

V₁ P₁ = V₂ P₂
  $\text{V2 =}\frac{\text{ 175 ×1}}{8}\text{= 21.8 L}$