The Ideal Gas Law adds one item to the three we have been working with, n = number of moles of the gas. Therefore, the new equation is PV = nRT. R is a constant we can calculate. Since a mole of a gas occupies 22.4 L at STP, we will use these values. R = PV / Tn = (101.3 kPa)(22.4 L) / (273 K)(1 mol) = begin mathsize 12px style bold 8 bold. bold 31 bold left parenthesis bold L bold times bold kPa bold right parenthesis bold divided by bold left parenthesis bold K bold times bold mol bold right parenthesis end style. We call this number the ideal gas constant.
With this information, you can calculate the volume, pressure, number of moles, or temperature of an ideal gas.
What is the pressure inside a 3.00 L ball that contains 1.23 mol of air at 32°C? Show your work. (4 points)
