Chemistry, asked by ajgamboa2, 8 months ago

Calculate the energy change when an electron moves from n=4 to n=6.

Answers

Answered by lalankumar99395
7

Answer:

so, 275 kJ of energy is released when one mole of electrons "falls" from n = 5 to n = 2. E = hc/λ (this energy corresponds to the energy of one photon; the energy calculated in this problem is for one mole of photons so we will change this after we change the units from kJ to J).

Answered by mohini6685
0

Explanation:

The question wants you to determine the energy that the incoming photon must have in order to allow the electron that absorbs it to jump from

n

i

=

2

to

n

f

=

6

.

A good starting point here will be to calculate the energy of the photon emitted when the electron falls from

n

i

=

6

to

n

f

=

2

by using the Rydberg equation.

1

λ

=

R

(

1

n

2

f

1

n

2

i

)

Here

wavelength of the emittted photon

R

is the Rydberg constant, equal to

1.097

10

7

m

1

Plug in your values to find

1

λ

=

1.097

10

7

.

m

1

(

1

2

2

1

6

2

)

1

λ

=

2.4378

10

6

.

m

1

This means that you have

λ

=

4.10

10

7

.

m

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