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Entropy (S) is a molecular 'disorder', or more precisely 'the number of microscopic arrangements of energy possible in a macroscopic sample'. Entropy depends strongly on the state and increases with rise in temperature.
Entropy changes (ΔS) are positive for reactions that generate gas molecules. The Second Law of Thermodynamics defines that the total entropy always increases in a spontaneous process, and reaches a maximum value at equilibrium. To apply this to chemical reactions it is necessary to include entropy changes in the surroundings caused by heat output or input. Both external and internal changes are taken account of by defining the Gibbs free energy change (ΔG): for a reaction performing at constant temperature.
Explain about the Dielectric Breakdown Dielectric Breakdown of a dielectric material is because of the excitation of electrons into the conduction band across energy
i) Electrophillic substitution in case of aromatic amines takes place more readily than benzene. ii) Nitro compounds have higher boiling points than hydrocarbons having almost s
Why magnesium does not impart any colour to Bunsen flame while calcium does
excited state for sodium
How many unpaired electrons are present in cobalt [Co] metal: (1) 2 (2) 3 (3) 4 (4) 7 Ans: 3
The series limit for Balmer series of H-spectra is: (1) 3800 (2) 4200 (3) 3646 (4) 4000 Ans: 3646
Q. What are the Chemical Properties of Nitric Acid? Ans. Reactions as an acid: Nitric acid ionizes well because it is a strong acid. HNO 3 --> H + + NO3 - It tur
Styrene rubber (GR-S or Buna-S or SBR or Ameripol): Styrene butadiene rubber (SBR) is prepared by the copolymerization of butadiene (75%) and styrene (25%) in an emulsion styrene
applications of photochemistry
LIMITATION OF THIRD LAW OF THERMODYNAMICS
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