Question

El volumen del aire en los pulmones de una persona es de 615 ml aproximadamente, a una presión de 760 mm Hg. La inhalación ocurre cuando la presión de los pulmones desciende a 752 mm Hg. ¿A qué volumen se expanden los pulmones?

Answer 1

The volume of air in a person's lungs is about 615 ml, at a pressure of 760 mm Hg. Inhalation occurs when the pressure in the lungs drops to 752 mm Hg. To what volume do the lungs expand?

Answer:

621.5mL

Explanation:

Given parameters:

Initial volume  = 615mL

Initial pressure  = 760mmHg

Final pressure  = 752mmHg

Unknown;

Final volume  = ?

Solution:

To solve this problem, we simply apply Boyle's law.

"the volume of a fixed mass of a gas varies inversely as the pressure changes if the temperature is constant".

    Mathematically;

              P₁V₁  = P₂V₂

P and V are the pressure

1 and 2 are the initial and final states

 Now insert the parameters and start;

               760 x 615  = 752 x V₂

                   V₂ = 621.5mL