Sodium street lamp gives off a characteristic yellow light of wavelength 588 nm. Calculate the energy mole (in kJ/mol) of these photons.

Sodium street lamp gives off a characteristic yellow light of waveleng

1.	Sodium street lamp gives off a characteristic yellow light of wavelength 588 nm. Calculate the energy mole (in kJ/mol) of these photons.
Answer» Solution :`E = N_(0) hv = N_(0) h (c)/(lamda) = ((6.02 XX 10^(23) mol^(-1)) xx (6.63 xx 10^(-34) Js) xx (3 xx 10^(8) ms^(-1)))/(588 xx 10^(-9) m)` `= 2.036 xx 10^(5) J mol^(-1)`