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The enthalpy of vaporization of water is approximately:

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Question: The enthalpy of vaporization of water is approximately:

Options:

  1. 40.79 kJ/mol
  2. 2260 kJ/mol
  3. 100 kJ/mol
  4. 60 kJ/mol

Correct Answer: 2260 kJ/mol

Solution: 

The enthalpy of vaporization of water is approximately 2260 kJ/mol.

The enthalpy of vaporization of water is approximately:

Practice Questions

Q1
The enthalpy of vaporization of water is approximately:
  1. 40.79 kJ/mol
  2. 2260 kJ/mol
  3. 100 kJ/mol
  4. 60 kJ/mol

Questions & Step-by-Step Solutions

The enthalpy of vaporization of water is approximately:
Correct Answer: 2260 kJ/mol
  • Step 1: Understand what enthalpy of vaporization means. It is the amount of energy needed to turn water from liquid to gas.
  • Step 2: Know that for water, this energy is quite high because water molecules are strongly attracted to each other.
  • Step 3: The value for the enthalpy of vaporization of water is around 2260 kJ for every mole of water.
  • Step 4: Remember that 'kJ/mol' means kilojoules per mole, which is a unit of energy per amount of substance.
  • Enthalpy of Vaporization – The amount of energy required to convert a unit mass of a liquid into vapor without a change in temperature.
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