Standard enthalpy changes

Descrição

Chemistry Quiz sobre Standard enthalpy changes, criado por leigh.smith em 17-03-2015.
leigh.smith
Quiz por leigh.smith, atualizado more than 1 year ago
leigh.smith
Criado por leigh.smith mais de 9 anos atrás
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2

Resumo de Recurso

Questão 1

Questão
What are standard conditions?
Responda
  • 1 atmosphere, 298K
  • 2 atmosphere
  • 200K

Questão 2

Questão
What is the standard enthalpy change of reaction?
Responda
  • The enthalpy change that accompanies a reaction in the molar quantities expressed in a chemical equation under standard conditions, all reactants and products being in their standard states
  • The enthalpy change that takes place when one mole of a substance reacts completely with oxygen under standard conditions, all reactants and products being in their standard states
  • The enthalpy change that takes place when one mole of a compound is formed from the constituent elements in their standard states under standard conditions

Questão 3

Questão
Which is the Hess cycle for enthalpy change of formation?

Questão 4

Questão
Which is the Hess cycle for enthalpy change of combustion?

Questão 5

Questão
What does Hess' law state?
Responda
  • If a reaction can take place by more than one route and the initial and final condition are the same, the total enthalpy change is the same for each route
  • If a reaction takes place by more than one route, the total enthalpy change differs for each route
  • A reaction cannot take place by more than one route

Questão 6

Questão
What is the standard enthalpy change of combustion?
Responda
  • The enthalpy change that accompanies a reaction in the molar quantities expressed in a chemical equation under standard conditions, all reactants and products being in their standard states
  • The enthalpy change that takes place when 1 mole of a substance reacts completely with oxygen under standard conditions, all reactants and products being in their standard states
  • The enthalpy change that takes place when 1 mole of a compound is formed from its constituent elements in their standard states under standard conditions

Questão 7

Questão
What is the enthalpy change of formation?
Responda
  • The enthalpy change that accompanies a reaction in the molar quantities expressed in a chemical equation under standard conditions, all reactants and products being in their standard states
  • The enthalpy change that takes place when 1 mole of a substance reacts completely with oxygen under standard conditions, all reactants and products being in their standard states
  • The enthalpy change that takes place when 1 mole of a compound is formed from its constituent elements in their standard states under standard conditions

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