where is the validity of 2 nd law of thermodynamics...?

Question

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

Answer 1

I don't really understand what your question is. In the first place, heat always flows from a warmer object to a cooler one. That maximizes the number of possible arrangements of energy quanta, leading to an increased entropy.

Answer 2

It is true that the heat flow is from the food products at a higher temperature to the refrigerant at a lower temperature, but it doesn't end there. The refrigerant is then compressed - the external work - thus raising its temperature even further, and removing the heat from it to the atmosphere - which is at a higher temperature than the food products. Thus when you consider the refrigerator as a system including the refrigerant and the compressor and associated parts, heat has been transferred from a cooler body to a hotter atmosphere

Answer 3

..."every one knows that" heat flows from high temp to low temp.
How a refrigerator works...
The refrigerant in a refrigerator (or air conditioner) is compressed. As this compressed refrigerant gas turns into liquid (in the coils behind your refrigerator) it cools to room temperature. Then this compressed liquid gas is allowed to expand in coils within your refrigerator. As the compressed liquid-gas expands it quickly evaporates an turns into gas. This rapid expansion/evaporation requires the absorption/transfer of energy (heat) from the surrounding area. (Think about how cool rubbing alcohol feels as it evaporates on your skin.) Now the gas that absorbed energy from inside the refrigerator is compressed again into liquid and cooled once again. The whole process repeats itself. That is why this whole process is sometimes referred to as a heat pump.
Nothing magical happened there and the 2nd law of thermodynamics:
"There is no process that, operating in a cycle, produces no other effect than the subtraction of a positive amount of heat from a reservoir and the production of an equal amount of work."
was certainly not broken.

Addition:
Perhaps you forgot about the compressor that runs on electricity??? Or that the compressed gas is doing a heat exchange between the inner environment of the refrigerator and the outer environment???

Answer 4

Please provide dazzling fact of regulation and then argue! warmth is the capacity which flows from intense temperature to low temperature spontaneously. in case you elect to kick back something you will could desire to create something close to via that's chillier than the object. This demands artwork to be finished to compress the evaporated refrigerant decrease back and allow it to evaporate so as that it cools back. refrigerant cools using fact capacity gets transferred, and this capacity can not be called warmth because it particularly is not getting transferred as a effect of temperature distinction. this you will call artwork which makes the capacity flow available.