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For the reaction A + B → C, if the enthalpy change ΔH is -150 kJ/mol, what can b

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Question: For the reaction A + B → C, if the enthalpy change ΔH is -150 kJ/mol, what can be inferred about the reaction?

Options:

  1. It is exothermic.
  2. It is endothermic.
  3. It is at equilibrium.
  4. It requires energy input.

Correct Answer: It is exothermic.

Solution: 

A negative ΔH indicates that the reaction releases heat, thus it is exothermic.

For the reaction A + B → C, if the enthalpy change ΔH is -150 kJ/mol, what can b

Practice Questions

Q1
For the reaction A + B → C, if the enthalpy change ΔH is -150 kJ/mol, what can be inferred about the reaction?
  1. It is exothermic.
  2. It is endothermic.
  3. It is at equilibrium.
  4. It requires energy input.

Questions & Step-by-Step Solutions

For the reaction A + B → C, if the enthalpy change ΔH is -150 kJ/mol, what can be inferred about the reaction?
  • Step 1: Identify the reaction given: A + B → C.
  • Step 2: Look at the enthalpy change (ΔH) value provided, which is -150 kJ/mol.
  • Step 3: Understand what a negative ΔH means: it indicates that heat is released during the reaction.
  • Step 4: Conclude that since heat is released, the reaction is classified as exothermic.
  • Enthalpy Change – Enthalpy change (ΔH) indicates whether a reaction absorbs or releases heat; a negative value signifies an exothermic reaction.
  • Exothermic Reactions – Exothermic reactions release energy in the form of heat, resulting in a temperature increase in the surroundings.
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