15 grams of water vapor is condensing. How much energy is needed for condensation?

Expert Answers

An illustration of the letter 'A' in a speech bubbles

The enthalapy of vaporization of water is given as  2257 KJ/kg. Consequently, enthalapy of condensation will be given as -2257 KJ/kg

During condensation, this much amount of energy would be released for complete condensation of water.

The given mass is 15 gm = 0.015 kg

Thus, the energy needed for condensation is 0.015 kg x -2257 KJ/kg = -33.855 KJ.

Thus, 33.855 KJ of energy would be released for condensation of 15 gm of water vapors.

Approved by eNotes Editorial Team

Posted on

Soaring plane image

We’ll help your grades soar

Start your 48-hour free trial and unlock all the summaries, Q&A, and analyses you need to get better grades now.

  • 30,000+ book summaries
  • 20% study tools discount
  • Ad-free content
  • PDF downloads
  • 300,000+ answers
  • 5-star customer support
Start your 48-Hour Free Trial