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The enthalpy change for the reaction A + B β†’ C is +50 kJ/mol. What can be said a

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Question: The enthalpy change for the reaction A + B β†’ C is +50 kJ/mol. What can be said about the reaction?

Options:

  1. It is exothermic
  2. It is endothermic
  3. It is spontaneous
  4. It is at equilibrium

Correct Answer: It is endothermic

Solution: 

A positive enthalpy change indicates that the reaction absorbs heat, thus it is endothermic.

The enthalpy change for the reaction A + B β†’ C is +50 kJ/mol. What can be said a

Practice Questions

Q1
The enthalpy change for the reaction A + B β†’ C is +50 kJ/mol. What can be said about the reaction?
  1. It is exothermic
  2. It is endothermic
  3. It is spontaneous
  4. It is at equilibrium

Questions & Step-by-Step Solutions

The enthalpy change for the reaction A + B β†’ C is +50 kJ/mol. What can be said about the reaction?
  • Step 1: Look at the enthalpy change value given in the question, which is +50 kJ/mol.
  • Step 2: Understand that a positive value means the reaction takes in heat from its surroundings.
  • Step 3: Recognize that when a reaction absorbs heat, it is classified as endothermic.
  • Step 4: Conclude that since the enthalpy change is positive, the reaction A + B β†’ C is endothermic.
  • Enthalpy Change – The enthalpy change (Ξ”H) indicates whether a reaction is exothermic (releases heat) or endothermic (absorbs heat). A positive value signifies an endothermic reaction.
  • Endothermic vs Exothermic Reactions – Endothermic reactions absorb heat from the surroundings, while exothermic reactions release heat.
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