A sample of nitrogen collected in the laboratory occupies a volume of 725 ml, at standard pressure. What volume will the gas occupy at a pressure of 49.3 kPa, assuming the temperature remains constant?

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Answer 1 · 2018-06-13T14:38:57

Well it is always a problem to know what is standard pressure....

Here I assume it is #101.3*kPa-=1*atm#...

We use old Boyle's Law...#PV=k#...and so #P_1V_1=P_2V_2#, given CONSTANT temperature, and a GIVEN quantity of gas.

And thus #V_2=(P_1V_1)/P_2-=(725*mLxx101.3*kPa)/(49.3*kPa)#

...so #V_2~=1.5*L#

...that is the volume has DOUBLED cos the pressure has HALVED...