entropy of the universe is always positive.Why?

Answer 1

Dont think it so vastly.
We know that, dS of uiverse=dS of system+ dS of surroundings
Because of System and surroundings Entropy Always move possitively so The Entopy of all Universe Is increasing. Itsgoing to reach his Highest limit.

Answer 2

Entropy is always positive by the definition of entropy. Entropy is always increasing for another reason. It's all statistics.

Here is the idea: entropy is loosely described as the disorder in a system. This is not its definition. Its definition is the mathematical one given by Boltzmann. Despite this, you can appeal to the "order" non-description.

Consider a chamber of gas separated into two parts by some partition. One part contains 1000 atoms of some gas and the other contains 1000 atoms of a different gas. Now we raise the partition and let the gasses mix. I think we can agree that totally mixed gasses are more disordered than totally unmixed gasses, so the disorder goes up. The question is this. What is the chance, if the atoms are moving kind of randomly, that you put the partition down and the atoms are totally separated again?

The answer is 2*(1/2)^2000, which is a number so small that my calculator undoubtedly cannot give me an answer for it.

Now most systems in the world have many, many more parts than this, so there is a possibility that entropy will decrease, that the mixed gasses will randomly separate, but one thousand thousand thousand thousand thousand does not begin to describe the number of particles in the world, much less the universe. The odds are so far against it that we call it a law of nature and move on.

For the record, if the system were made up of two particles, the odds of entropy decreasing would be very significant.

Answer 3

Entropy Of The Universe

Answer 4

In any process, the total energy of the universe remains constant.

An important law of physics, the second law of thermodynamics, states that the total entropy of any isolated thermodynamic system tends to increase over time, approaching a maximum value. Unlike almost all other laws of physics, this associates thermodynamics with a definite arrow of time.

(The entropy of a system that is not isolated may decrease. For example, an air conditioner cools the air in a room, thus reducing the entropy of the air. However the heat involved in operating the air conditioner always makes a bigger contribution to the entropy of the environment than the decrease of the entropy of the air. Thus the total entropy of the room and the environment increases, in agreement with the second law.)

Answer 5

First of all, entropy is a relative term and is not absolute. So, we can't measure entropy but only change in entropy can be measured. It is a measure of disorder. If the disorder is decreased, then we can have a negative entropy change. Disorder decreases with a decrease in tempearture. But if we consider the whole universe, though there is a decrease in temperature at one particular point, there will be increase in temperature at other points. So, you will always see a positive change in entropy. According to third law of thermodynamics, change in entropy would be zero only at absolute temperature. And we can not attain absolute zero temperature as there would be temperature corresponding to zero point energy associated with the atoms. That is the reason why we can attain hundredth of a Kelvin but not absolute zero. In order for the change in entropy to be negative, you have to go below absolute zero which is not possible. At absolute zero, atoms won't move which means that everything is ordered and the change in entropy is zero.

Answer 6

As possible comprehend, entropy is the thought that each and every little thing is at last headed to mass confusion (to place it merely) and randomness. One good thank you to place that's that each and every little thing interior the universe will at last grow to be warmth potential, it somewhat is random. that's merely the way it somewhat works. you're questioning with regard to the small image, and not the huge image. Now, what happens once you eliminate the laptop??? enable's make it straight forward and say you throw it away, and it will somewhat gets incinerated. There you pass. . .warmth. Now, of direction in case you think of roughly ink being spilled on a drawing, that's too small. you ought to seem at like an engine's performance. for occasion, the quad-quicker W16 engine interior the Bugatti Veyron is approximately 33% useful. The engine places out 1001 horsepower to propel it forward. regardless of the shown fact that, the engine creates a finished potential of roughly 3010 horsepower; the different 2009 horsepower are misplaced interior the variety of warmth. . .there you have it, entropy.

Answer 7

For the best explanation, look up Stefan Boltzman's statistical explanation of entropy, derviing the formula S = k In W, where S is entropy, k is Boltzman's constant, and W is the "number of states available to the system". The expression, In W, if real, is always positive.

Answer 8

Entropy is something related to randomness, and as the universe is expanding the randomness is also increasing, and so entropy always remains positive.

Answer 9

because entropy always increases.basically entropy is the randomness of a system n as we know randomness always increases so entropy increases

Answer 10

because disorderness in the universe is contonously increasing , due to increase in disorderness of the molecules the temperature is also continously increasing