Question

1 mole of photon each of frequency 2500 per second would have approximately or Total energy of

1)10 erg 2)1 Joule. 3)1 eV 4)1 MeV​

Answer 1

Answer:

As the question here is given for 1 mole of photon hence we have to use the formulae of the energy E to be plank's constant h * frequency f * number of atoms n.

So, energy is E = 6.023 * 10²³  *  6.626 * 10⁻³⁴ * 2500  Joules

Or, on calculating we get the value of the E to be approximately 10*10∧-7Joules which is equal to 10 erg as 1 joule is 10∧7 erg.

Answer 2

E=nhv

6.023*10^23*6.63*10^-34*2500

=10000*10^-11*10

=10^-6 J

=1 erg