Question

Calculate energy of one mole of photons of radiation whose frequency is $5\times {10}^{14}.$

Answer 1

The energy of one photon (E) $=hv$

Here, $h=6.626\times {10}^{34}$ js

$v=5\times {10}^{14}{s}^{-1}$

$E=6.626\times {10}^{-34}\times 5\times {10}^{14}$

$3.313\times {10}^{-19}$ j

Thus the energy of one mole of photons is $E\times A$

Where A is the Avogadro number

$=3.313\times {10}^{-19}j\times 6.022\times {10}^{-23}$ mol

$=199.50\times {10}^{-3}jmol$