Gas Mixtures Flashcards
What is molar analysis?
describes a mixture by specifying moles of components
What is Gravimetric analysis?
Describes a mixture by specifying mass of each component
When do real gases behave like ideal gases?
Real gases can behave like ideal gases at low pressure or high temperature relative to critical point values
What is Daltons Law?
The pressure of a gas mixture is equal to the sum of the pressures each gas would exert if it existed alone at the mixture temperature and volume
What is Amagats’s Law
The volume of a gas mixture is equal to the sum of the volumes each gas would occupy if it existed alone at the mixture temperature and pressure
How should more accurate compressibility factor be obtained?
The compressibility factor of mixture at high pressure tends to be more accurate if $Z_i$ are found using Amagat’s Law, and for low pressure with Dalton’s Law
What is Kay’s rule
Uses pseudocritical temperatures and pressure $T’{cr,m}$ and $P’{cr,m}$ for predicting P-v-T behavior
What is a convention for extensive and intensive properties of gas mixtures?
The extensive properties of a gas mixture like Internal Energy, Enthalpy, and Entropy can be found by just summing the contributions of individual components
The intensive properties of a mixture are obtained by averaging the properties of the components
How can you know if a gas mixture should be treated as ideal?
If the gases in a mixture are at a high temperature and low pressure relative to their critical values, they can be treated as ideal gases without significant error
What is Gibbs-Dalton Law?
If the gases in a mixture are at a high temperature and low pressure relative to their critical values, they can be treated as ideal gases and the individual gas components act as if they existed alone
Why does Amagats Law generally give more accurate partial pressure?
It accounts for influence on intermolecular forces
