Question

Oxygen gas contained in a 1.35 L vessel is transferred to 755 mL vessel. The initial pressure was 515 mmHg and the temperature was 34 degrees Celcius. What is the new pressure?
a755 mmHg

b0.921 atm

c921 mmHg

d0.755 mmHg

Answer 1

Given:

Initial Volume, V1 = 1.35 L

New Volume, V2 = 755 mL = 0.755 L

Initial pressure, P1 = 515 mm Hg

To Find:

New pressure of the oxygen gas.

Calculation:

- Applying Boyle's Law to the given condition, we get:

P1 × V1 = P2 × V2

⇒ P2 = P1 × V1/V2

⇒ P2 = 515 × 1.35/0.755

⇒ P2 = 920.86 mm Hg ≈ 921 mm Hg

- So, the new pressure of the oxygen gas is 920.86 mm Hg.

- Hence, the correct answer is option (C) 921 mm Hg.