A gas occupying a volume of 725 mL at a pressure of 1.345 atm is allowed to expand at constant temperature until its pressure reaches 0.345 atm. What is its final volume?

Answer 1

Constant temperature is an example of Boyle's law:

P1V1 = P2V2

P1 = initial pressure =1.345 atm

V1 = initial volume = 725 ml

P2 = final pressure = 0.345 atm

V2 = final volume = ?

Substituting in the equation and solving for V2, we have ...

(1.345 atm)(725 ml) = (0.345 atm)(x ml)

x = 2,826 mls = 2.826 L

Correcting for significant figures, the answer would be...

2830 mls = 2.83 L