Medical Science
Concise Book Of Physical Chemistry
by Dr. Mahesh Chandra
ISBN Number : 978 - 1- 73038 - 191 - 1
Authors Details
| Author Name | Image | About Author |
|---|---|---|
| Dr. Mahesh Chandra |  |
Assistant Professor in chemistry,
Deshbandhu college university of Delhi. He did his M.SC. in
Chemistry from jai NarainVyas university, jodhpur (Raj.) in 2003
and Ph.D from jai NarainVyas university, jodhpur (Raj.) under the
guidance of (PROF.) Dr.R.S.Sindal in 2006. He has been teaching
since 2005.His areas of interested include Thermodynamics,
Surface Chemistry and Polymer chemistry.
Dr. Mahesh Chandra has published 21 research papers, many
articles and attends and presents many research papers in
international and national conference and seminars. He is also member of many chemical
society and organization.
This book has been written for physical Chemistry part of Basic Science as such is on a footing
and there has been no change in it in last three decades, However the available books on
physical Chemistry are not in tune with the redefined emphasis in the new course content and
hence this textbook has been written . Each chapter has been developed almost independent of
other. Drawing the crystal structure and physical concepts have been emphasized and
presentation is exceptionally lucid to read and understand, so much so that difficult topics like
solid state will appear easy. Almost every concept is followed by solved numerical. At the end
chapter very good numerical problems with answers are given. |
Book Description
Photochemistry is defined as that branch of chemistry which deals with the study of photo – processes i.e. processes involving absorption or emission of light (visible, infrared or ultra – voilet) Photo-processes are manly of two types: (I) Photophysical processes (ii) Photochemical processes or photochemical reactions. Photophysical processes are those processes which take place in the presence of light but do not involve any chemical reaction. These processes arise on account of the absorption of light by the abstances followed by emission of absorbed light. If the absorbed light is emitted instantaneously the process is called fluorescence. If the absorbed light is emitted after some time lag, the process is called phosphorescence. Further if the energy of the light absorbed is sufficiently high, the electrons may not only jump to the outer levels but may leave the atoms completely the process is called photoelectric effect. Thus photo physical processes include phenomena like fluorescence, phosphorescence and photoelectric effect. Photochemical reactions are those reactions which take place due to the absorption of light by interacting substances. These reactions are generally brought about the absorption of light radiation of by the reacting substances. These reactions are generally brought about the absorption of light radiation of the visible and ultraviolet region which lie between 8000 – 2000 A (800 – 200nm). In these cases, the light energy absorbed is stored within the substance and then used for bringing about the reaction. Two well known examples of photochemical reactions are:
