Question

How is energy conserved in an endothermic reaction?

Answer 1

Hint : Angular momentum is defined as the measure of the rotational momentum of the rotating body which is equal to the product of the angular velocity of the system and the moment of the inertia to the axis.

Complete Step by step answer:
As per Bohr’s atomic model, the angular momentum of the electron that is orbiting around the nucleus is quantized. He also stated that the electrons will move only in those orbits where the angular momentum of the electron is an integral multiple of h/2.
The quantization of the angular momentum indicates that the radius of the orbit and the energy will be quantized as well. Also, Bohr assumed that the discrete lines that are seen in the spectrum of the hydrogen atom are due to the transitions of the electron from one allowed orbit to another.
The quantized energy indicates that the electrons can possess only certain discrete energy values and the values between these quantized values are not permitted. These involve the relatively heavy nucleus with the electrons moving around it.
The angular momentum is quantized in the elementary particles and the electrons in the atoms. The molecules have the characteristic rotation spectra.

Note:
1. Angular momentum is a vector quantity and has both magnitude and direction. It is the inertia of rotation motion.
2. Bohr’s atomic model works for one electron or the ions.
3. Quantization is the concept that indicates that the physical quantity will have certain discrete values only. Angular momentum, Electrical charge, energy, matter, and light are all quantized.