Chemistry

Botswana international university of science and technology

Here are the best resources to pass Chemistry. Find Chemistry study guides, notes, assignments, and much more.

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Introduction to Physical Chemistry Introduction to Physical Chemistry
  • Introduction to Physical Chemistry

  • Class notes • 14 pages • 2020
  • Physical chemistry is the study of macroscopic, and particulate phenomena in chemical systems in terms of the principles, practices, and concepts of physics such as motion, energy, force, time, thermodynamics, quantum chemistry, statistical mechanics, analytical dynamics and chemical equilibrium.
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Chemical kinetics Chemical kinetics
  • Chemical kinetics

  • Class notes • 16 pages • 2020
  • rate (kinetics) Kinetics: Rate. Chemical Kinetics - The study of the rates of chemical reactions. Rate of a Reaction - The change in concentration of one of the reactants (DX), during a given period of time (Dt) The reaction rate gradually decreases as reactants are consumed.
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Chemical reaction rate Chemical reaction rate
  • Chemical reaction rate

  • Class notes • 16 pages • 2020
  • Reaction rate, in chemistry, the speed at which a chemical reaction proceeds. It is often expressed in terms of either the concentration (amount per unit volume) of a product that is formed in a unit of time or the concentration of a reactant that is consumed in a unit of time.
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Reaction rate(average rates and Instantenous rates) Reaction rate(average rates and Instantenous rates)
  • Reaction rate(average rates and Instantenous rates)

  • Class notes • 12 pages • 2020
  • Reaction rate, in chemistry, the speed at which a chemical reaction proceeds. It is often expressed in terms of either the concentration (amount per unit volume) of a product that is formed in a unit of time or the concentration of a reactant that is consumed in a unit of time.
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Rate laws Rate laws
  • Rate laws

  • Class notes • 17 pages • 2020
  • Because the rate of a reaction has dimensions of concentration per unit time, the dimensions of the rate constant k depend on the exponents of the concentration terms in the rate law. If p is the sum of the exponents of the concentration terms in the rate law, p=a b
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Activation energy calculations Activation energy calculations
  • Activation energy calculations

  • Class notes • 10 pages • 2020
  • Step 1: Convert temperatures from degrees Celsius to Kelvin. T = degrees Celsius 273.15. T1 = 3 273.15. ... Step 2 - Find Ea ln(k2/k1) = Ea/R x (1/T1 - 1/T2) ln(7.1 x 10-2/8.9 x 10-3) = Ea/8.3145 J/K·mol x (1/276.15 K - 1/308.15 K) ... Answer: The activation energy for this reaction is 4.59 x 104 J/mol or 45.9 kJ/mol.
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Intergrated rate laws Intergrated rate laws
  • Intergrated rate laws

  • Class notes • 9 pages • 2020
  • The rate law is a differential equation, meaning that it describes the change in concentration of reactant(s) per change in time. Using calculus, the rate law can be integrated to obtain an integrated rate equation that links concentrations of reactants or products with time directly.
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Half life reactions Half life reactions
  • Half life reactions

  • Class notes • 23 pages • 2020
  • The half-life of a reaction, t1/2, is the amount of time needed for a reactant concentration to decrease by half compared to its initial concentration. Its application is used in chemistry and medicine to predict the concentration of a substance over time.
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 Rate constants and Order of reactions  Rate constants and Order of reactions
  • Rate constants and Order of reactions

  • Class notes • 39 pages • 2020
  • k is the first-order rate constant, which has units of 1/s. The method of determining the order of a reaction is known as the method of initial rates. The overall order of a reaction is the sum of all the exponents of the concentration terms in the rate equation.
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