At constant temperature, a sample of 6.0 L of O₂ at 3.0 atm pressure is compressed until the volume decreases to 2.5 L. What is the new pressure in atmospheres?

Question

Quizplus · Accepted Answer

According to Boyle's Law, at constant temperature, the product of pressure and volume is constant. Thus, P1V1 = P2V2.
P1 = 3.0 atm, V1 = 6.0 L, V2 = 2.5 L
Therefore, P2 = (P1V1)/V2 = (3.0 atm x 6.0 L) / 2.5 L = 7.2 atm. 
The correct answer is D.

At Constant Temperature, a Sample of 6