If the energy difference between two electronic states is 214 .68 kJ mol^-1, calculate the frequency of light emitted when an electron drops from higher to lower state. (Planck's constant h = 39. 79 x 10^-14 k Js mol^-1)

Solution

Here, $Here comma space space space increment straight E space equals space straight E subscript straight n 2 end subscript space minus space straight E subscript straight n 1 end subscript space space space space space space space space space space space space space space space space space equals space 214.68 space kJ space mol to the power of negative 1 end exponent straight h space equals space 39.79 space cross times space 10 to the power of negative 14 end exponent kJs space mol to the power of negative 1 end exponent$
According to Planck's quantum theory,
$increment straight E space equals space hv$
$therefore space space space space space space space space straight v space equals space fraction numerator increment straight E over denominator straight h end fraction$ ....(1)
Substituting the value in (1),
$straight v space equals space fraction numerator 214.68 space kJ space mol to the power of negative 1 end exponent over denominator 39.79 space cross times space 10 to the power of negative 14 end exponent straight k space Js space mol to the power of negative 1 end exponent end fraction space space space space equals space 5.39 space cross times space 10 to the power of 14 straight s to the power of negative 1 end exponent$

Some More Questions From Structure of Atom Chapter

For Daily Free Study Material Join wiredfaculty

Structure Of Atom

If the energy difference between two electronic states is 214 .68 kJ mol^-1, calculate the frequency of light emitted when an electron drops from higher to lower state. (Planck's constant h = 39. 79 x 10^-14 k Js mol^-1)

Some More Questions From Structure of Atom Chapter

What is a neutron?

What is the name of the remaining part of atom except outer orbit?

Name the particles which determine the mass of an element.

What are α-particles?

Why were neutrons discovered very late?

What are the fundamental particles present in a neutral atom having atomic number greater than 1?

Do protons and neutrons have identical mass?

When α-particles are sent through a thin metal foil, most of them go straight through the foil. What inference do you draw from it?

What did Rutherford's experiment on scattering of particles show for the first time?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Phone Number

Email Address

Loaction

For Daily Free Study Material Join wiredfaculty

Structure Of Atom

If the energy difference between two electronic states is 214 .68 kJ mol-1, calculate the frequency of light emitted when an electron drops from higher to lower state. (Planck's constant h = 39. 79 x 10-14 k Js mol-1)

Some More Questions From Structure of Atom Chapter

What is a neutron?

What is the name of the remaining part of atom except outer orbit?

Name the particles which determine the mass of an element.

What are α-particles?

Why were neutrons discovered very late?

What are the fundamental particles present in a neutral atom having atomic number greater than 1?

Do protons and neutrons have identical mass?

When α-particles are sent through a thin metal foil, most of them go straight through the foil. What inference do you draw from it?

What did Rutherford's experiment on scattering of particles show for the first time?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

If the energy difference between two electronic states is 214 .68 kJ mol^-1, calculate the frequency of light emitted when an electron drops from higher to lower state. (Planck's constant h = 39. 79 x 10^-14 k Js mol^-1)