Calculating Volume Using Combined Gas Law

What is the initial volume of the oxygen gas sample at 331 K?

Given data: The volume of the oxygen gas sample at 385 K is 863.3 mL. Initial temperature: 331 K.

Answer:

The initial volume of the oxygen gas sample at 331 K was approximately 0.7427 L.

To find the initial volume of the oxygen gas sample at 331 K, we can use the combined gas law:

(P1 * V1) / T1 = (P2 * V2) / T2

Given that pressure (P1 and P2) is constant, we can simplify the equation to:

V1 = (V2 * T1) / T2

Substitute the values:

V1 = (0.8633 L * 331 K) / 385 K

V1 = 0.7427 L

Therefore, the initial volume of the oxygen gas sample at 331 K was approximately 0.7427 L.