Standard enthalpy changes

Descripción

Chemistry Test sobre Standard enthalpy changes, creado por leigh.smith el 17/03/2015.
leigh.smith
Test por leigh.smith, actualizado hace más de 1 año
leigh.smith
Creado por leigh.smith hace más de 9 años
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2

Resumen del Recurso

Pregunta 1

Pregunta
What are standard conditions?
Respuesta
  • 1 atmosphere, 298K
  • 2 atmosphere
  • 200K

Pregunta 2

Pregunta
What is the standard enthalpy change of reaction?
Respuesta
  • 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

Pregunta 3

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

Pregunta 4

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

Pregunta 5

Pregunta
What does Hess' law state?
Respuesta
  • 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

Pregunta 6

Pregunta
What is the standard enthalpy change of combustion?
Respuesta
  • 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

Pregunta 7

Pregunta
What is the enthalpy change of formation?
Respuesta
  • 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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