/sci/ - Science & Math

Chemist here, I wasn't going to reply at first because I assumed 46 posts was more than enough for someone to answer this question. I guess that was too optimistic.

First of all, energy is not released when bonds are broken. It is amazing how many times in this thread people have referred to an energy release when a bond is broken, this is wrong. Breaking a bond requires the conversion of kinetic energy to potential energy in order to pull the atoms apart.

Energy is released upon the formation of bonds in the form of heat. Why? When atoms are about to form a bond, they are attracted to each other. That is to say, they both have potential energy. This attraction will cause them to accelerate towards each other, converting that potential energy to kinetic energy. When they finally crash together, the kinetic energy that each atom had upon collision is conserved and transferred to the newly formed molecule; the new molecule now has more kinetic energy than the two atoms had before they began interacting. As you know, temperature is the average kinetic energy of a system at equilibrium, and the kinetic energy can be thought of as heat. A bond has been formed and heat has been released. But where did the heat come from? It came from potential energy. The magnitude of this conversion is called enthalpy.

Enthalpy means "hidden heat". This is a little misleading in that enthalpy never refers to one thing having it, it always refers to a process; ergo, enthalpy is a measure of change... it is a measure of the conversion between kinetic and potential energy when atoms interact to form bonds and when molecules interact in liquids, gases etc, it is a measure of the change(or difference) in inter and intramolecular bonds between one molecule and another or between one solution and another. The heat is "hidden" because it is liberated from potential energy.

>>6368487
very derivative or was that integral to the joke?

How does this work?
www.youtube.com/watch?v=RkLfpXpO5sQ
I need some serious physics help here. I’ve watched the video several times and even did some stop frame stuff to look for wires and hidden motors. Is it possible that eddy currents induced into the ball bearing are producing a motor effect?