SELECT * FROM question_mgmt as q WHERE id=1283 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=2 AND subId=9 AND chapterId=43 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED)

Question:

Calculate the energy required for the process

The ionization energy for the H atom in the ground state is 2.18 ×10–18 J atom–1

Answer:

For H like particles,

En = - 2π2mZ2e4 / n2h2

For H atom  I.E = E – E1 = 0 – (- 2π2me4 / 12h2) = 2π2me4 / h2

= 2.18x 10-18J /atom (given)

For the given process, energy required = En – E1

= 0 -  ( - 2π2me4 / 12h2)

= 4 x 2π2me4 / h2

= 4 x 2.18 x 10-18J

= 8.72 x 10-18 J


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