The energy required by electrons, present in the first Bohr orbit of hydrogen atom to be excited to second Bohr orbit is $____$ $J mol^{- 1}$ .
Given : R = 2.18 × 10^-11 ergs.

Question

The energy required by electrons, present in the first Bohr orbit of hydrogen atom to be excited to second Bohr orbit is ____ J mol − 1 . Given : R = 2.18 × 10 -11 ergs.

TestHub · Accepted Answer

E n ​ Δ E ​ = − R H ​ × n 2 Z 2 ​ = 2.18 × 1 0 − 11 × 1 0 − 7 × 1 2 [ 1 2 1 ​ − 2 2 1 ​ ] = 1.635 × 1 0 − 18 Joule / atom = 1.635 × 1 0 − 18 × 6.02 × 1 0 23 Joule / mole = 9.835 × 1 0 5 Joule / mole ​

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