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What does the term 'enthalpy of reaction' refer to?

Practice Questions

Q1
What does the term 'enthalpy of reaction' refer to?
  1. The heat absorbed or released at constant pressure
  2. The change in internal energy
  3. The work done by the system
  4. The temperature change during a reaction

Questions & Step-by-Step Solutions

What does the term 'enthalpy of reaction' refer to?
  • Step 1: Understand that 'enthalpy' is a measure of heat energy in a system.
  • Step 2: Recognize that a 'reaction' refers to a chemical change where substances transform into new substances.
  • Step 3: Realize that 'enthalpy of reaction' specifically looks at the heat involved during this chemical change.
  • Step 4: Note that this measurement is taken at 'constant pressure', meaning the pressure does not change during the reaction.
  • Step 5: Conclude that the enthalpy of reaction tells us whether heat is absorbed (endothermic) or released (exothermic) during the reaction.
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