CHEM 1A03 Lecture Notes - Lecture 3: Enthalpy, Phosphorus Pentachloride, Joule

• School: McMaster University
• Department: Chemistry
• Course: CHEM 1A03
• Professor: David Brock

Document Summary

Do not start the questions until you have completed the reading. In a forward reaction, the reactants collide to produce products and it goes from left to right. Macroscopic properties are constant (color, mass, density, pressure, concentrations): define equilibrium. Macroscopic properties are constant. (color, mass, density, pressure, concentrations: define the word dynamic and explain its relevance to the concept of equilibrium. The reverse reaction rate increases as equilibrium is approached because as the reaction goes from left to right, the concentrations of the products increases, therefore there are more product collisions causing the reverse reaction rate to increase. As a reaction is approaching equilibrium describe how the following change. Explain what causes each change: reactant concentration. As the reaction goes to the right, the reaction concentration decreases: products concentration. As the reaction goes from left to right, the concentration of the products increases: forward reaction rate.