I have been thinking alot about this 1st Law, where energy is neither created or destroyed and i am having difficulty understanding this.

After viewing a number of PBS shows about the universe is expanding based on Quantam Physics and the discussions of String Theory in which there may be more than one universe, not to mention the discussions of Quarks and Deep Energy which makes up 70% of the univers, DOES THIS LAW STILL MAKE SENSE AND IS IT STILL CORRECT?

Views: 485

Reply to This

Replies to This Discussion

Yes, Jim, you are right, we mostly deal with the first law using classical thermo. It's still correct.

It's statistical thermo that deals with quantum states of atoms and particles. String theory and multiple universes are still under debate. A quark is just a sub-atomic particle which makes up matter. We do deal with deep energy retrofits using the first law of thermo, however, the search for dark energy in the universe has little to do with our daily tasks.

There is an area where advanced physics comes into play within the work of home energy pros: photovoltaics. Solar cells use sunlight as a radiation source to  induce electrons to transfer between different bands (i.e., from the valence to conduction bands) within the material, resulting in the buildup of voltage between two electrodes.

Also some of the electronic components we use like transistors, integrated circuits, diodes, make use of quantum physics and electrodynamics.

 

The laws of thermodyamics still hold in regards to heat, energy, and work in the real world in which we live. From wikipedia:    [sorry, can't get rid of bold type]

The four laws of thermodynamics are:

  • Zeroth law of thermodynamicsIf two systems are in thermal equilibrium with a third system, they must be in thermal equilibrium with each other. This law helps define the notion of temperature.
  • Third law of thermodynamicsThe entropy of a system approaches a constant value as the temperature approaches zero.The entropy of a system at absolute zero is typically zero, and in all cases is determined only by the number of different ground states it has. Specifically, the entropy of a pure crystalline substance at absolute zero temperature is zero.

Hope this is helpful!

Jim, on second thought: Uh oh: entangled particles break second law of thermodynamics . The second law of thermo, or no perpetual motion machines, is being revisited. Quantum teleportation of light particles of 89 miles happened this year: Quantum teleportation using active feed-forward between two Canary ... . There will certainly be quantum technologies introduced into society and home energy applications within the next century. Great discussion topic!

Jim . . . I would add that plenty of things at the quantum level behave differently than what we are used to observing (and understanding) on the larger scale.   As an example, You might be interested in this video:   http://www.youtube.com/watch?v=DfPeprQ7oGc.

RSS

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.

Latest Activity

Sean McLoughlin's blog post was featured

Programming in-floor electric radiant heat, is it worth it?

Does a programmable thermostat for an in-floor electric radiant heat system add efficiency, or is…See More
2 minutes ago
Paul Raymer's 2 blog posts were featured
3 minutes ago
Tony Hicks's discussion was featured

Slab-on-grade Insulation

Hi my name is Anthony Hicks, and I'm from Fort Wayne, Indiana. I work for a home building company…See More
4 minutes ago
Larry Schaffert's discussion was featured

How to correctly insulate exterior wall in a 1900 house?

We are working with a homeowner who had frozen pipes over the winter.  Their home is a balloon…See More
4 minutes ago
Bryan Pringle's discussion was featured

Dense packed cellulose in basement?

I am looking for advice on a project I would like to attempt in my own home. It is an 1840s cape…See More
5 minutes ago
William Fisher's discussion was featured

Can tankless water heaters provide hot water even when the groundwater is fairly cold?

Hi, I live in Cleveland where the ground temperature water can get quite cold during the winter.…See More
5 minutes ago
Home Energy Magazine posted a discussion

Share Your Story at ACI National

Have you experienced a haunted attic or crawl space that had a will of its own? Do tell! In a…See More
1 hour ago
Kim Tanner's video was featured

Single Family Residential Air Leakage Testing

This session will cover the basics of air leakage testing on a single family home as well as issues that affect the accuracy and repeatability of the test. T...
2 hours ago

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service