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Which of the following reactions has the highest enthalpy change?

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Question: Which of the following reactions has the highest enthalpy change?

Options:

  1. Dissolving NaCl in water
  2. Combustion of propane
  3. Formation of NH3 from N2 and H2
  4. Sublimation of dry ice

Correct Answer: Combustion of propane

Solution: 

The combustion of propane releases a large amount of energy, resulting in the highest enthalpy change among the options.

Which of the following reactions has the highest enthalpy change?

Practice Questions

Q1
Which of the following reactions has the highest enthalpy change?
  1. Dissolving NaCl in water
  2. Combustion of propane
  3. Formation of NH3 from N2 and H2
  4. Sublimation of dry ice

Questions & Step-by-Step Solutions

Which of the following reactions has the highest enthalpy change?
Correct Answer: Combustion of propane
  • Step 1: Understand what enthalpy change means. It is the amount of energy released or absorbed during a chemical reaction.
  • Step 2: Identify the reactions given in the question. Look for the one that involves combustion.
  • Step 3: Recognize that combustion reactions typically release a lot of energy.
  • Step 4: Compare the energy released in each reaction. The one that releases the most energy has the highest enthalpy change.
  • Step 5: Conclude that the combustion of propane releases a large amount of energy, making it the reaction with the highest enthalpy change.
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