Presentation on theme: "PV = nRT Ideal Gas Law P = pressure in atm V = volume in liters"— Presentation transcript:
1 PV = nRT Ideal Gas Law P = pressure in atm V = volume in liters n = molesR = proportionality constant= L atm/ mol·KT = temperature in KelvinsHolds closely at P < 1 atm
2 Ideal GasesIdeal gases are imaginary gases that perfectly fit all of the assumptions of the kinetic molecular theory.Gases consist of tiny particles that are far apartrelative to their size.Collisions between gas particles and betweenparticles and the walls of the container areelastic collisionsNo kinetic energy is lost in elasticcollisions
3 Ideal Gases (continued) Gas particles are in constant, rapid motion. Theytherefore possess kinetic energy, the energy ofmotionThere are no forces of attraction between gasparticlesThe average kinetic energy of gas particlesdepends on temperature, not on the identityof the particle.
4 Real Gases Do Not Behave Ideally Real gases DO experience inter-molecular attractionsReal gases DO have volumeReal gases DO NOT have elastic collisions
5 Deviations from Ideal Behavior Likely to behave nearly ideallyGases at high temperature and low pressureSmall non-polar gas moleculesLikely not to behave ideallyGases at low temperature and high pressureLarge, polar gas molecules