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Applications of Thermochemistry in Everyday Life (Nutrition (Even cooling…
Applications of Thermochemistry in Everyday Life
Nutrition
Even cooling systems use heat
Inside the refrigerator there is an evaporator into which the heat from the refrigerated compartment flows
Evaporator contains a refrigerant gas like ammonia or freon 12
At a low pressure, gas from evaporator is released into pipe, then evaporates it which causes it to cool
Pipe take refrigerant to compressor, pumping it to condenser at high pressure
Condenser is a long series of pipes located at the back of refrigerator that turns gas into liquid
This is important for food preservation
While moving through condenser, gas heats, and heat is released into the air around refrigerator
Cooling systems reverse the process that heats particles
Refrigerator pulls heat from inner compartment where food is stored and transfers to other region
Using an Oven
All ovens heat through convection
convection means transferring heat through a fluid
Convection occurs naturally
Heated air has a lower density than less heated air in the atmosphere above it and is buoyant
While rising, it loses energy and cools
Now the air is cooled and more dense than the air around it, sinks and repeats the cycle again
This is important when cooking/baking
Convection allows movement of heated material
When air is heated, it displaces unheated air in it's path, setting up convection current