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☆☆☆☆☆The total kinetic energy of the particles in a system
Energy = hc/λ
h = Planck's constant (6.626 × 10-34 m2 kg/s)
c = the speed of light (3.00 × 108 m/s)
λ = the wavelength
Example question: What is the energy of a photon with a wavelength of 700 nm?
Convert the wavelength to meters (1 nm = 10-9 m)
700 nm = 700 × 10-9 m
Energy = (6.626 × 10-34)(3.00 × 108) ÷ (700 × 10-9) = 2.84 × 10-19 J
If you add the exact mass of the protons, neutrons, and electrons in an atom you do not get the exact atomic mass of the isotope. The diference is called the mass defect. The difference between the mass of the atomic nucleus and the sum of the masses of the particles within the nucleus is known as the mass defect.
Gas
Energy is transferred when molecules absorb electromagnetic waves.
G=18 kJ/mol
CH4(g) + 2O2(g) CO2(g) + 2H2O(g) + 802 kJ/mol
ms= +1/2
its nucleus is unstable
30kj
-wxm
4.5 × 1015 J
solid-apex
it is never spontaneous
Chemical rocket
