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If the enthalpy change for a reaction is -500 kJ for 5 moles, what is the enthal

Practice Questions

Q1
If the enthalpy change for a reaction is -500 kJ for 5 moles, what is the enthalpy change for 1 mole?
  1. 100 kJ
  2. 500 kJ
  3. 200 kJ
  4. 50 kJ

Questions & Step-by-Step Solutions

If the enthalpy change for a reaction is -500 kJ for 5 moles, what is the enthalpy change for 1 mole?
  • Step 1: Understand that the enthalpy change given is for 5 moles of a reaction.
  • Step 2: Identify that you need to find the enthalpy change for just 1 mole.
  • Step 3: To find the enthalpy change for 1 mole, divide the total enthalpy change by the number of moles.
  • Step 4: Perform the calculation: -500 kJ divided by 5 moles equals -100 kJ per mole.
  • Step 5: Conclude that the enthalpy change for 1 mole is -100 kJ.
  • Enthalpy Change – Understanding how to calculate the enthalpy change per mole from a total enthalpy change for a given number of moles.
  • Stoichiometry – Applying stoichiometric principles to relate quantities of reactants and products in a chemical reaction.
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