The energy of one mole of photons of radiation of frequency 2 × 10 12 Hz in J mol - 1 is _________. (Nearest Integer) [2023]

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Solution

Q.
The energy of one mole of photons of radiation of frequency $2 \times 10^{12} Hz$ in ${J mol}^{- 1}$ is _________. (Nearest Integer)

[Given: $h = 6.626 \times 10^{- 34} Js$ ]

[ $N_{A} = 6.022 \times 10^{23} {mol}^{- 1}$ ] [2023]

Ans.
(798)

$E = n h ν$

For one mole of photons,

$E = 6.022 \times 10^{23} \times 6.626 \times 10^{- 34} \times 2 \times 10^{12}$

$E = 798.03 J$

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