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Series
Chemistry essentials volume 040
Description
In this video lesson, Paul Andersen explains how the reaction path can be described in an energy profile. Enough energy must be added to reach the activation energy required and stress the bonds. Eventually the bonds break and new bonds are formed. The rate constant is temperature dependent. The Arrhenius equation can be used to calculate the activation energy when the temperature and rate constant are calculated.--Publisher.
Series
Chemistry essentials volume 067
Description
In this video lesson, Paul Andersen explains how disturbances to a reversible reaction at equilibrium affect the equilibrium constant and the reaction quotient. For example, if the concentration is changed, the reaction will move to reestablish the equilibrium constant. If the temperature is changed, a new equilibrium constant will be established.--Publisher.
Series
Chemistry essentials volume 066
Description
In this video lesson, Paul Andersen explains how Le Chatelier's Principle can be used to predict the effect of disturbances to equilibrium. When a reversible reaction is at equilibrium, disturbances (in concentration, temperature, pressure, etc.) will be offset to reach a new equilibrium.--Publisher.
24) The rate law
Series
Chemistry essentials volume 036
Description
In this video lesson, Paul Andersen explains how the rate law can be used to determine the speed of a reaction over time. Zeroth-order, first-order, and second-order reactions are described as well as the overall rate law of a reaction. The rate of a reaction can be determined experimentally.--Publisher.
25) Heat exchange
Series
Chemistry essentials volume 047
Description
In this video lesson, Paul Andersen explains how energy can be transferred from warmer objects to colder objects through heat. Temperature is a measure of the average kinetic energy of the particles in a substance. When two objects are in contact, collisions between the particles will transfer energy from the warmer object in the form of heat.--Publisher.
26) The mole
Series
Chemistry essentials volume 003
Description
In this video lesson, Paul Andersen defines and explains the importance of the mole. The mole is simply a number (like a dozen) used to express the massive number of atoms in matter. It serves as a bridge between the mass of a compound and the number of particles. It is represented in chemical reactions as the coefficient before reactants and products.--Publisher.
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