Chapter 10: Ideal gas laws

STP (standard temp. and pressure)

273.15K and 1 atm

Combined gas law

(P₁V₁)/T₁ = (P₂V₂)/T₂

Ideal gas law

PV = nRT

R constant =

8.314 J/mol

Equation for formula weight using ideal gas law

FW = (Density x R x T)/P

Dalton’s Law

(P_a)/P_total = (n_a)/n_total

Graham’s Law

Properties of gas particles

How does the pressure of a real gas compare to the pressure of an ideal gas at low temperatures?

At low temperatures, the pressure of a real gas is lower than the pressure of an ideal gas due to the effect of intermolecular forces affecting the collisions between molecules

Which letter has the highest temp.?

C

When do gases behave the least like ideal gases?

At low temperatures and high pressures

Pressure and volume are _________ proportional’ whose law?

inversely; Boyle’s

Volume and temperature are _________ proportional; whose law?

directly; Charles’

Temperature and pressure are _________ proportional; whose law?

directly; Gay-lussac’s