Ideal Gases 14.3

Ideal Gas Law Describes physical behavior of an ideal gas in terms of P, V, T, and n PV = nRT R = ideal gas constant = 8.31 (L∙kPa)/(K∙mol) = (L∙atm)/(K∙mol) = 62.4 (L∙Torr)/(K∙mol)

Real Gas vs. Ideal Gas Ideal Gas –Particles take up no space –No intermolecular forces –Follows gas laws under all conditions of T and P

In real world NO gas is truly ideal Most will behave like ideal gases at many T and P levels, so we can use the ideal gas law Exception: High pressure, low temperature

Real Gases Attractive forces significant as T is lowered and pressure exerted by gas is less

How many moles of a gas at 100.0°C does it take to fill a 1.00 L flask to a pressure of 1.50 atm?

A deep underground cavern contains 2.24 x 10 6 L of methane gas at a pressure of 1.5 x 10 3 kPa and a T of 315 K. How many kilograms of CH 4 does the cavern contain.