Question

A 6.5 L sample of nitrogen at 25^◦C and 0.76 atm is allowed to expand to 13.0 L. The temperature remains constant. What is the final pressure?

1.) 0.063 atm

2.) 0.75 atm

3.) 0.38 atm

4.) 3.0 atm

5.) 0.12 atm

Answer 1

From Boyle's law,

At constant T,

P1V1=P2V2

P1=0.76atm

V1=6.5L

V2=13L

P2=?

P1V1=P2V2

P2=P1V1/V2

P2=0.76*6.5/13

P2=0.38atm

So the final.pressure = 0.38atm