Question

1.1

A sample of oxygen occupies 47.2 L under a pressure of 1240 torr at 25 °C. What
volume would it occupy at 25 °C if the pressure were decreased to 730 torr?​

Answer 1

80.2L

Step-by-step explanation:

Given parameters:

Initial volume of oxygen = 47.2L

Initial pressure of oxygen = 1240torr

Final pressure = 730torr

Unknown:

Final volume = ?

Solution:

To solve this problem, we apply the Boyle's law proposed by Robert Boyle. It states that "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 pressure and volume

1 and 2 are initial and final states

1240 x 47.2 = 730 x V₂

V₂ = 80.2L