Question 1
a) Ammonia is a colorless gas with a very pungent smell. It turns damp red litmus blue which indicates it's basic nature. It is lighter than air. It is easily liquefied by cooling or by compressing, as it is easy to transport in tanks and cylinders. It has a high critical temperature. Because Ammonia can be liquefied easily and it has a high heat of vaporization, one of its uses is as refrigerant.
Refrigerants are the materials used for cooling. the method of refrigeration is achieved by lowering the temperature of ammonia below that of its surroundings. The usual method is by vapor compression. Many condensable vapors are used as refrigerants e.g. chlorofluorocarbons (freons), ammonia and carbon-di-oxide but ammonia is the only one which does not cause depletion of ozone.
Facts about Ammonia:
Boiling point: -33.5 degree centigrade.
Melting point: -77.7 degree centigrade.
a) Ammonia is a colorless gas with a very pungent smell. It turns damp red litmus blue which indicates it's basic nature. It is lighter than air. It is easily liquefied by cooling or by compressing, as it is easy to transport in tanks and cylinders. It has a high critical temperature. Because Ammonia can be liquefied easily and it has a high heat of vaporization, one of its uses is as refrigerant.
Refrigerants are the materials used for cooling. the method of refrigeration is achieved by lowering the temperature of ammonia below that of its surroundings. The usual method is by vapor compression. Many condensable vapors are used as refrigerants e.g. chlorofluorocarbons (freons), ammonia and carbon-di-oxide but ammonia is the only one which does not cause depletion of ozone.
Facts about Ammonia:
Boiling point: -33.5 degree centigrade.
Melting point: -77.7 degree centigrade.
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