eV is a unit of energy. It is exactly the amount of kineitic energy that one electron would obtain if it accelerated across one volt of potential difference. You do not convert eV to volts. You convert eV to joules.Since potential difference is defined as the energy per unit charge ratio you will get a unit of energy when you multiply a unit of charge times a unit of potential, hence "electron-Volt"; here the charge is the fundamental charge of the electron. A joule (unit of energy) is equivalent to a "coulomb-volt." Since 1.602 x 10^-19 coulombs is the charge of an electron, then 1eV = 1.602x10^-19 joules.
Assuming the above is correct, let's make some calculations, shall we?
A typical nuclear reaction releases millions of electron volts. This sounds impressive, and is, but consider this on an atom by atom basis. If only 1 atom has a nuclear event and releases about 1 million electron volts, how many watts is that? Well, 1 joule equals 1 watt. 1 million electron volts = 10 ^6 times 1.6 x 10 ^-19 which equals only 1.6 x 10^-13 watts. Not much energy from just one atom. But there are many atoms. How many?
Since there are 6.02 times 10 to the 23rd power atoms in one mole of any substance, and in the case of nickel, about 60 grams. This reaction if carried through all of the atoms in 1 mole or 60 grams (approx) would yield approx 10 ^11 watts of energy. Now that's a lot.
The foregoing discussion was not intended to show that a lot of energy can be obtained from a nuclear reaction. That isn't new. What is intended is to show that not that much energy is required to make a fusion happen on the atomic level. Since fusion takes place in the stars at 100,000,000 million degrees Kelvin, this is equivalent to about 10,000 electron volts per atom. If you had the control to deliver 10,000 electron volts to individual atoms, you can have enough energy for fusion. The key word is control. This is the key word in all fusion research, whether it is in a tokomak or a polywell or a deep plasma focus, or a star. The method of control varies from system to system. In stars, it is gravitation. In most fusion devices, plasma is controlled by magnetism. In a polywell, electrons are controlled with magnetism and the reactants are introduced after the energy potential has been achieved. In "cold fusion", where's the control? Is it chemical, or is it bypassed by quantum effects? That's the question, I think.
Update:
This discussion is a lot like something I said before.
While I am at it, I want to link to other posts that were similar in some concept.
While I was looking for that, I found a video with this young lady saying that a gallon of water has the energy of 55 million miles. And I thought it was only 25 million miles a gallon.
cold fusion: fire from water |
" 'cold fusion' is a surface effect phenomenon" |
catalysts for "cold fusion". Is it a chemical process? |
"palladium on activated carbon" |
Sir Arthur Clarke refers to it as "so called cold fusion"
discusses the history of the wright brothers and how their discovery was not believed for years. |
No comments:
Post a Comment