Question

A sample of gas has a volume of 135 ml at 0.600 atm. what would be the volume if the pressure is decreased to 0.200 atm while temperature is held constant? 405 ml 101 ml 180 ml 135 ml 45.0 ml

Answer 1

Answer: -

405 mL

Explanation: -

Initial Pressure P 1 = 0.6 atm

Final Pressure P 2 = 0.2 atm

Initial volume V 1 = 135 mL

Using Boyle's Law,

At constant temperature,

P 1 x V 1 = P 2 x V 2

0.6 atm x 135 mL = 0.2 atm x V 2

Final volume = V 2 = $\frac{0.6 atm x 135 mL}{0.2 atm}$

= 405 mL

Thus if a sample of gas has a volume of 135 ml at 0.600 atm. 405 mL would be the volume if the pressure is decreased to 0.200 atm while temperature is held constant.