Question

Determine the volume of one mole of an ideal gas at 25 degrees celsius and 0.915 kPa/

Answer 1

Since you are using the ideal gas law with the pressure in kelvins the constant must be 8.31

Answer 2

well the ideal gas law states
PV=nRT
but the temperature has to be in Kelvin so add 273 to convert celcius to Kelvin
so itd be
.915kPa(V)=1(8.314)(298)

Answer 3

Correction: I meant the pressure is in kilopascals (kPa) so therefore the constant must be 8.31 L* kPa/K * mols

Answer 4

So if you change it to atm would the constant be .0821?

Answer 5

Would that change the answer?

Answer 6

The number would only change a small amount. However for the most part it will end up pretty much the same except for the ones and the decimal's places.

Answer 7

Thank you very much! You guys helped a lot. :) Oh but one quick thing... how do you know how many significant digits to put in your answer? I always get tripped up on that part.

Answer 8

well it is by the least amount of significant figures in the problem usually so this one would be 3 sig figs

Answer 9

Ok thank you very much!

Answer 10

How do you find n in an ideal gas law equation?

Answer 11

well you solve for the variable so pv=nrt would then be pv/rt=n

Answer 12

Thanks!!! :)