if you put 120 volts of electricity through the pickel, the pickle will smoke an
ID: 75785 • Letter: I
Question
if you put 120 volts of electricity through the pickel, the pickle will smoke and start glowing an orange-yellow color.The light is emitted because the sodium ions in the pickle become exicted; their return to the ground state results in light emission. (a) the wavelength of this emitted light is 589 nm and calculate its frequency. (b) what is the energy of 0.10 mole of these photons? (C) calculate the gap between the exicted state and ground statees for sodium ions.(d) if you soak the pickle in the different salt solution,such as strotium chloride, would you still observe 589nm light emission?Why of why not?Explanation / Answer
a) speed of light = frequency*wavelength frequency = speed of light/wavelength = (3e8 m/s )/(589 nm *(1m/1e9nm)) = 5.09 e14 s^-1 or 5.09 e14 Hz b) E = h*frequency, where h = 6.626e-34 Js, Planck's constnat E = 6.626e-34 Js *(5.09e14 s^-1) = 3.37 e-19 J (perphoton) 0.10 mol *(6.022e23 /mol) *(3.37e-19 J) = 20.3 kJ c) E = 6.626e-34 Js *(5.09e14 s^-1) = 3.37 e-19 J (perphoton) or 3.37e-19 J *(1eV/1.60e-19 J) = 2.11 eV d) No, because the gap between excited and ground states isdependent on the ions available. Sodium has a 589 emission. Butstrontium does not necessarily have a 589 emission either. (theemission spectra is dependent on the nuclear charge of thespecies)
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