Where is the validity of 2 nd law of thermodynamics...?in the evaporator?

Question

according to second law of thrmo dynamics..every one knows that heat will flow from body at lower temparature to body at higher temparature with the aid of external agency(work)..then...consider a refregerator..in the evaporator .heat is actually flowing from high temparature products(food ,items ..etc) to low temparature refregerant(which is cooled by expanding to lowpressure).....but not from low temparature refregerant to high temprature products..

Answer 1

I answered your previous post.... It seems like you don't understand the process of evaporation (turning from liquid to gas). For example:
At 100 degreesC, water can be a gas, a liquid, or both. However, as a gas at 100C, water vapor contains more energy than liquid water at 100C. The process of evaporation (turning liquid into gas) requires energy that is not registered as an increase in temperature. Each change in state (solid to liquid, liquid to gas) requires and "extra boost" of energy not registered as temperature to the material changing states. (Also think about ice water...)
So, when the the compressed liquid refrigerant is allowed to expand and turn into gas (evaporation) the surrounding energy within the refrigerator "boils" the the refrigerant giving the refrigerant the energy to turn into a gas...
This whole process would not be possible without the compressor.
The refrigerant gas, normally pure ammonia, boils at -27C @ ambient pressure. But through compression it is turned into liquid at room temp. But when it is allowed to expand in the coils within the refrigerator it quickly boils turning into a gas "absorbing" the required energy from interior of the refrigerator.... So, if some how the inside of the refrigerator was -30C the liquid ammonia would fail to turn into a gas and the liquid amonia would actually be warming the interior since it was initially a liquid at room temp....

Answer 2

that's actual that the warmth pass is from the nutrition products at a miles better temperature to the refrigerant at a decrease temperature, besides the undeniable fact that it does not end there. The refrigerant is then compressed - the exterior artwork - subsequently raising its temperature even extra, and removing the warmth from it to the ambience - this is at a miles better temperature than the nutrition products. subsequently once you communicate the refrigerator as a gadget alongside with the refrigerant and the compressor and linked factors, warmth has been transferred from a cooler physique to a warmer environment

Answer 3

Please give correct statement of law and then argue! Heat is the energy which flows from high temperature to low temperature spontaneously. If you want to cool something you will have to create something near by which is colder than the object. This requires work to be done to compress the evaporated refrigerant back and allow it to evaporate so that it cools again. refrigerant cools because energy gets transferred, and this energy cannot be called heat as it is not getting transferred as a result of temperature difference. This you may call work which makes the energy transfer possible.