I have a thought experiment I don't understand.(adsbygoogle = window.adsbygoogle || []).push({});

Imagine there's a grain of salt that weighs 5 mg and it's 1mm above above a pool of water and it's on a very thing piece of flimsy material that takes about 1*10^-5 Newtons of force to break. Using Newton's 2nd law, I get the grain of salt is pushing downwards at a force of ~4*10^-5 Newtons. So it needs another 3*10^-5 Newtons to break the material. Since it is 1mm above the water, the work needed is 3*10^-8 Joules. ( Correct me if my math/formulas are wrong).

Using the ∆G= ∆H-T∆S. ∆H is 3*10^-8 let's say the temperature is 330 K. Assume that T∆S>3*10^-8. The entropy would be increased, I think, b/c the breaking of salt into Na and Cl- ions increases the possible microstates of the solution.

My question is, in the real world would the material break spontaneously? It seems counterintuitive. Thanks

**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!

# Free Energy Thought Experiment Question

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