I read many definitions in the internet such as (entropy is the amount of disorder),but they didn't make sense to me
let us assume that we have a specific amount of specific gas in closed constant volume container, if we give the gas some heat and then remove the same amount of heat from the gas then we will have an increase of entropy of the gas, which means our gas is different from the gas we started with even after removing the gas !! (this is what makes no sense to me)
can you explain what is the entropy with some examples please
let us assume that we have a specific amount of specific gas in closed constant volume container, if we give the gas some heat and then remove the same amount of heat from the gas then we will have an increase of entropy of the gas, which means our gas is different from the gas we started with even after removing the gas !! (this is what makes no sense to me)
can you explain what is the entropy with some examples please
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is a tough concept really. entropy is a thermodynamic principle representing 'lost work' by a system.
for your example, assume that the gas is red and white marbles initially ordered with all the red marbles at the bottom. you heat the gas and withdraw the heat again. the marbles are now disorganized and it would take work to reorganize them back to initial conditions. even though the macroscopic state is identical, the internal microstucture is different. not every process is reversible. take a book and flip it upside down and then open it. try it again and open book first and then flip it. order counts for something....http://en.wikipedia.org/wiki/Entropy may help. good question!
for your example, assume that the gas is red and white marbles initially ordered with all the red marbles at the bottom. you heat the gas and withdraw the heat again. the marbles are now disorganized and it would take work to reorganize them back to initial conditions. even though the macroscopic state is identical, the internal microstucture is different. not every process is reversible. take a book and flip it upside down and then open it. try it again and open book first and then flip it. order counts for something....http://en.wikipedia.org/wiki/Entropy may help. good question!