Standard enthalpy changes

leigh.smith
Quiz by leigh.smith, updated more than 1 year ago
leigh.smith
Created by leigh.smith over 6 years ago
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2

Description

Chemistry Quiz on Standard enthalpy changes, created by leigh.smith on 17/03/2015.

Resource summary

Question 1

Question
What are standard conditions?
Answer
  • 1 atmosphere, 298K
  • 2 atmosphere
  • 200K

Question 2

Question
What is the standard enthalpy change of reaction?
Answer
  • 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

Question 3

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

Question 4

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

Question 5

Question
What does Hess' law state?
Answer
  • 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

Question 6

Question
What is the standard enthalpy change of combustion?
Answer
  • 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

Question 7

Question
What is the enthalpy change of formation?
Answer
  • 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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