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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.
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Explain Composition of individual phase in phase diagram – two phase? If the system point is in a two-phase area of the phase diagram, we draw a horizontal tie line of constant
Q)why is the extraction of copper from pyrites more difficult than that from its oxide ore through reduction? Ans) The Standard free energy of formation of Cu2S is greater than
The specific heat of a substance is the amount of energy required to raise one gram of the material by one degree centigrade. But what happens if you get an ice cube too hot? It i
Thin layer chromatography (TLC) Detection of excessive levels of one or more amino acids in blood plasma or in urine is often crucial for diagnosis of a group of genetic (inheri
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Q. Describe Lime-soda method for softening of hard water. Discuss the advantages of the process and the chemistry involved in it.
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