jedishrfu said:I think you're mixing apples and oranges here. Einstein's E=mc^2 applies to nuclear reactions whereas Dalton's law applies specifically to chemical reactions.
In a chemical reaction, electrons are interchanged, bonds are made, others are broken and energy is either given off or absorbed but no nuclear reactions are happening.
jagdishdash said:But daltons law of constabt mass is voilated as states that while a reaction the mass of product = mass of reactant
any explanations?
http://www.phys.unsw.edu.au/einsteinlight/jw/module5_binding.htmAn oxygen molecule is also stable, which is another way of saying that it takes energy E to pull two oxygen atoms apart. So you could think of the animation as representing a stable molecule. However, the binding energies of molecules are much less than those of nuclei, and so the masses involved are smaller. A typical chemical reaction might involve a nett energy of 30 kJ per mole, or 5 x 10-20 J per molecule. So the change in mass is 5 x 10-37 kg, which is only .0001% of the mass of an electron.
jedishrfu said:I think you're mixing apples and oranges here. Einstein's E=mc^2 applies to nuclear reactions whereas Dalton's law applies specifically to chemical reactions.
In a chemical reaction, electrons are interchanged, bonds are made, others are broken and energy is either given off or absorbed but no nuclear reactions are happening.
E=mc^2 is a famous equation proposed by Albert Einstein that states the equivalency between mass and energy. It means that mass and energy are different forms of the same thing and can be converted into one another.
E=mc^2 was proposed by Einstein in his theory of special relativity, which was published in 1905. He derived the equation by combining the concepts of mass and energy from the work of other scientists, such as Max Planck and Henri Poincaré.
Yes, the equation E=mc^2 has been proven through various experiments, such as nuclear reactions, which convert a small amount of mass into a large amount of energy. This concept is also used in nuclear power plants and atomic bombs.
No, E=mc^2 can also be applied to particles without mass, such as photons. In this case, the equation is modified to E=hf, where h is Planck's constant and f is the frequency of the photon.
Mass-energy equivalence is the principle that mass and energy are interchangeable and are essentially different forms of the same thing. E=mc^2 is the mathematical representation of this principle, showing the relationship between the two quantities.