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The enthalpy of vaporization of water is approximately ____ kJ/mol.

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Question: The enthalpy of vaporization of water is approximately ____ kJ/mol.

Options:

  1. 40.79
  2. 60.79
  3. 80.79
  4. 100.79

Correct Answer: 40.79

Solution: 

The enthalpy of vaporization of water is approximately 40.79 kJ/mol.

The enthalpy of vaporization of water is approximately ____ kJ/mol.

Practice Questions

Q1
The enthalpy of vaporization of water is approximately ____ kJ/mol.
  1. 40.79
  2. 60.79
  3. 80.79
  4. 100.79

Questions & Step-by-Step Solutions

The enthalpy of vaporization of water is approximately ____ kJ/mol.
  • Step 1: Understand what enthalpy of vaporization means. It is the amount of energy needed to turn a liquid into a gas at a constant temperature.
  • Step 2: Know that for water, this energy is measured in kilojoules per mole (kJ/mol).
  • Step 3: Look up the value for the enthalpy of vaporization of water. It is a commonly known value.
  • Step 4: Find that the enthalpy of vaporization of water is approximately 40.79 kJ/mol.
  • Enthalpy of Vaporization – The amount of energy required to convert one mole of a substance from liquid to gas at constant temperature and pressure.
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