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Lyla Erdman ∙
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
Gas
Energy is transferred when molecules absorb electromagnetic waves.
It is not spontaneous.
CH4(g) + 2O2(g) CO2(g) + 2H2O(g) + 802 kJ/mol
Kinetics
ms= +1/2
G = 0 kJ/mol
the system has become more random
The wavelength is 671 nm.
solid-apex
it is never spontaneous
Chemical rocket