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Born Haber Cycle
Born Haber Cycle - Based on Hess's law Born and Haber in 1919 developed a simplified and cyclic method to correlate lattice energies of ionic crystals to other thermodynamic data. For example, the net energy changes during the formation of sodium ch..
Born Haber Cycle
Based on Hess's law Born and Haber in 1919 developed a simplified and cyclic method to correlate lattice energies of ionic crystals to other thermodynamic data. For example, the net energy changes during the formation of sodium chloride from metallic sodium and chlorine gas can ..
Shifts in disease / pest cycles of animals and plants
.g., low temperature and high humidity favour asthma, coastal climate favouring elephantiasis, heavy rainfall favouring malaria. Recent spread of mosquito borne diseases like malaria in US and dengue in India are examples of spread of tropical habitat northward favouring growth and develo..
Proton affinities
The Born Haber cycle can also be used to calculate the proton affinities (PA) of some bases. The proton affinity of a species X is defined as the energy released in the reaction: ..
The Born Haber cycle can also be used to calculate the proton affinities (PA) of some bases. The proton affinity of a species X is defined as the energy released in the reaction: ..High pressure
Since Haber's process proceeds with a decrease in volume, it is favored by high pressure. In actual practice, a pressure of 200 - 900 atmospheres is employe..
The Life of a Star
The life cycle of a star begins with the accretion of hydrogen and helium gas at -173 o C into smaller dense clouds, which contract under their own gravity. This dense cloud of gas contracting under its own gravity is called a Protostar. A cloud of gas from which a star is born..
Malaria
This insect-borne disease is caused by a parasitic protozoan, plasmodium and is transmitted from person to person by the bite of an insect vector, the female anopheles mosquito. When a mosquito bites an infected person, the protozoa are sucked into the stomach of insect along with the blo..
Chemical Reactions Introduction
Introduction - There are just 26 alphabets in English language, but the number of words are innumerable. You have studied about the 115 known elements and how they are classified for systematic and comprehensive study. Thousands of compounds are born by various chemical reactions involvin..
Mixed Farming
While modern day farmers specialize in one agricultural sector, either dairy or growing potatoes, their predecessors kept a wide array of farm animals and planted many different kinds of field crops. Their farms were remarkably self sufficient, producing eggs, meat, milk, vegetables and grains for ..
Mixed Farming
Mixed Farming - While modern day farmers specialize in one agricultural sector, either dairy or growing potatoes, their predecessors kept a wide array of farm animals and planted many different kinds of field crops. Their farms were remarkably self sufficient, producing eggs, meat, milk, vegetables..
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