(adsbygoogle = window.adsbygoogle || []).push({}); The measured value of the latent heat of vaporization of argon (at 1 atm) is

6.43 kJ/mol. Use this to estimate the binding energy.

(Given answer: 0.059 eV)

[Boiling point @ 1atm: 87.3K]

My initial approach was that since 6,430 joules worth of bonds had to be broken for a mole of Argon to vaporize, then to obtain the binding energy I could just divide the latent heat by the number of molecules in a mole. This gave me an incorrect answer of .067 eV and is clearly an oversimplified approach.

Any thoughts?

Edit: Never mind I got it.

I forgot to subtract the work that goes into the expansion of the gas, and that it's the change in internal energy that's at question.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Determining binding energy from latent heat of vaporization

Can you offer guidance or do you also need help?

**Physics Forums | Science Articles, Homework Help, Discussion**