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Thermochemistry (How is it relevant to real life? (The principles of…
What is it ?
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branch of chemistry that deals with the quantity of heat evolved or absorbed during a chemical reaction.
Everyday Applications
Cooking
cooking uses heat in different ways whether it is by using different types of reactions to heat food up or to even cool something down.
Heat occurs in 3 ways
Convection: heat transfer by flowing current, need the physical flow of matter. Ex: cooking meat by boiling it in water
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Conduction: heat transfer by direct contact, requires things to touch. Ex: cooking a hot dog in a pan.
Cooking is the process of changing the chemistry of food by transferring energy to the food long enough so that it is safe and digestible,and accomplishes the ideal flavor, succulence, appearance, and sustenance.
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Refrigerators
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Both the vaporization of refrigerants in the compressor and the reaction to the iron oxidation in a hand warmer generate a change in heat content under constant pressure.
refrigerators operate by the same reverse-heat-engine principle of converting work to heat, but use substances other than air.
The working substance in a modern refrigerators is called the coolant; the coolant changes from gas to liquid as it goes from higher to lower temperature.
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