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Desiccants (drying agents) can often be regenerated by heating. A desiccant that is commonly regenerated is
CaSO4?2H2O:
CaSO4?.2H2O(s) → CaSO4(s) + 2H2O(g)
?Ho = 25.1 kJ/mol; ?So = 69.3 J/molK
Regeneration is carried out at 250 oC.
a) What is the ?Go for this reaction?
What are the various types of point defects? How are they caused? (i) Vacancies: This refers to a missing atom or a vacant atomic site because of absence of a matri
Coupling reaction - Miscellaneous reactions Phenol couples along with benzene diazonium chloride in existence of an alkaline solution to make a red dye (p-hydroxy azobenzene).
Q. Show Chemical properties of Thorium metal? You know that actinium and all the actinides are radioactive. Of these only uranium and thorium are extracted from ores, all other
When a result of barium nitrate and a solution of copper(II) sulphate are mixed a chemical reaction produces solid barium sulphate which sinks to the bottom and a solution of coppe
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principle
NaCl
You may have eaten "astronaut ice cream" as a kid at a science museum or planetarium to experience the type of food eaten by astronauts. Astronaut ice cream is made by chilling the
The nucleus of the element 21 E 45 contains: (1) 45 protons and 21 neutrons (2) 21 protons and 24 neutrons (3) 21 protons and 45 neutrons (4) 24 protons and 21 n
Explain term 'depletion layer' across a p-n junction Rectifying action of p-n diode can be explained on the foundation of electronic structure of the semiconductor. When a pure
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