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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.
Reduction of Alkyne: Alkynes add on hydrogen in existence of appropriate catalysts like finely divided Ni, Pd. Determine if the triple bond is not found at the end of t
How does crystallography help in study of crystal structure
This of the following substances has giant covalent structure: (1) Iodine crystal (2) Solid co 2 (3) Silica (4) White phosphorus A
An adiabatic air compressor is to be powered by a direct-coupled adiabatic steam turbine that is also driving a generator. Steam enters the turbine at 12.5 MPa and 500oC at a rate
The covalent bond produced by the unequal sharing of electrons among the two atoms is known as polar covalent bond.
Explain why nichrome and not copper is used as heating element whereas manganin is used as standard resistance? For heating elements, primary requirements are high melting poin
some examples of RELATIVE MOLECULAR MASS OF SOLUTES BY RELATIVE LOWERING OF VAPOR PRESSURE
Addition reactions - Organic Chemistry Addition reactions are given by those compounds that have at least one p bond, i.e.,
Q. Illustrate about Borohydrides? Borohydrides like NaBH 4 ,, Be(BH 4 ,) 2 and Al(BH 4 )are the salts of complex tetrahydridoborate anion, BH - 4 ,. Since in BH - 4 ,. bor
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