Capítulo 2
Termodinâmica e Cinética Química
Reações Químicas
A balanced chemical equation provides the information of chemical formulas of the reactants and products involved in the chemical change. A ...
Entalpia e Calor de Reação
Combustion, commonly known as burning, is a reaction in which a substance reacts with an oxidizing agent, which in most cases is molecular oxygen, to ...
Energética da Formação de Soluções
The formation of a solution is an example of a spontaneous process, which is a process that occurs under specified conditions without energy from some ...
Entropia e Solvatação
The process of surrounding a solute with solvent is called solvation. It involves evenly distributing the solute within the solvent. The rule of thumb for ...
Energia Livre de Gibbs e Favorabilidade Termodinâmica
The spontaneity of a process depends upon the temperature of the system. Phase transitions, for example, will proceed spontaneously in one direction or ...
Equilíbrios Químico e de Solubilidade
The free energy change associated with dissolving a solute in a liter of solvent is called the free energy of a solution, ΔGsolution. The overall ...
Lei de Taxa e Ordem de Reação
The rate of a reaction is affected by the concentrations of reactants. Rate laws (differential rate laws) or rate equations are mathematical expressions ...
Efeito da Mudança de Temperatura na Taxa de Reação
The Arrhenius equation,
relates the activation energy and the rate constant, k, for many chemical reactions.
In this equation, R is the ideal gas ...
Reações em várias etapas
Chemical reactions often occur in a stepwise fashion involving two or more distinct reactions taking place in a sequence. A balanced equation indicates ...
Energia de Dissociação de Ligação e Energia de Ativação
Bond energy is the energy required to break a bond homolytically. These values are usually expressed in units of kcal/mol or kJ/mol and are referred to as ...
Diagramas de Energia, Estados de Transição e Intermediários
Free-energy diagrams, or reaction coordinate diagrams, are graphs showing the energy changes that occur during a chemical reaction. The reaction ...
Prevendo Resultados de Reações
Kinetics describes the rate and path by which a reaction occurs. In contrast, thermodynamics deals with state functions and describes the properties, ...
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