Soul of Chemistry

Thermodynamics Short questions and Answers. 1.      Thermodynamics is the branch of physics that deals with the study of energy and its transformations in systems. 2.     It encompasses the principles governing heat, work, temperature, and energy transfer. 3.     The laws of thermodynamics provide a framework for understanding the behavior of macroscopic systems. Get Notes on Thermodynamics for BSc here. 4.     The first law of thermodynamics states that energy is conserved in a closed system. 5.     It relates the change in internal energy of a system to the heat added to it and the work done on or by the system. 6.     The second law of thermodynamics establishes the concept of entropy, which characterizes the direction of spontaneous processes. 7.     It states that the entropy of an isolated system tends to increase over time. 8.     The third law of thermodynamics states that the entropy of a perfect crystal approaches zero as its temperature approaches absolute zero. 9.     The c

 Hydrogen Spectrum: Details in simple explanation Electrons of hydrogen atoms when absorb energy, get excited to the next higher shells. These excited electrons emit energy (in form of light), when they jump down to the lower energy levels. These energy (emitted light) are observed on a fluorescent screen which appear as group of lines. The number of lines observed on the screen indicates the number of possible transitions made by excited electrons. By Rajettan - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=41466201 4. Actual obsevation of line spectrum By OrangeDog, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=6278485 The hydrogen spectrum refers to the specific set of wavelengths of electromagnetic radiation emitted or absorbed by hydrogen atoms. When hydrogen atoms are excited, typically by heating or passing an electric current through a gas, they emit light of different wavelengths. The hydrogen spectrum is well-known and has been exte