Refrigerators keep their interiors cool by transferring heat out of the interior of the system to the outside. In reality the total system (the inside of the refrigerator and the room it's in) winds up with more heat but the part we want cold has less heat energy. A bit confusing, but lets step through the process.
A bit of background and a few facts:
Following the freon in the refrigeration and see what happens!
So where did this take us. The freon absorbed the heat from inside the heat. It then lost this heat to the room. So the inside of the fridge got cooler and the room got warmer.
Answer:
Heat differs from temperature, a cup of tea has a higher temperature than the Pacific Ocean, however it has incredibly less heat. I.e heat represents the total kinetic energy of the particles, and temperature represents the average kinetic energy.
heat transfers from the body with the higher temperature to the body with the lower temp ( not the one that has lower amount of heat) till both reach equilibrium status.
when we have a certain amount of gas and we pressure it to a smaller volume the average kinetic energy (temperature) increases.
when energy is transfered to a certain object it increases its temperature, however sometimes the energy dedicates it self not to increase the object's temp. rather to change its status e.g from solid to liquid or from liquid to gas.
now the fridge contains what we call freon, when it is liquidated it seeks its original ,gaseous, status, so it absorbs energy from the air inside the fridge so it can free it self. It does not absorb energy from the room because it is insulated.
later the freon is compressed, thus its average kinetic energy (temp) increases, and the thermal equilibrium achieved is disturbed. Note that the total kenetic energy is the same before and after compression.
to achieve equilibrium again the freon shall lose heat to the outside medium (the total K.E is decreased )
then the freon is left free again and its volume increases while its average kenetic energy decreases and thus it shall absorb heat from inside the fridge till equilibrium is achieved , and so on.
"Fridge" is a short name for 'refrigerator'.
It keeps your food cold and fresh....
AKA a temperature regulated cupboard used to store items that rot,
for longer periods of time, without freezing them.
fruit ,vegetables ,any dairy products .(they will go sour) meat
food, drinks, leftovers.
yes
Cos it does
people keep things in the to keep things cool
perishables.
Chill, cool ,separate, wash.
in ancient time the people use ice and snow to preserve the food. Then they think about a machine to cool the food . this leads to the invention of refrigerator.
It keeps stuff cool
white
they put them in a jar in a cool, underground celler
Magnetism and friction
because it helps keep the things inside cool
You can use it as chalk, camouflage your skin, and some people put it in old freezers and fridges to keep out moisture