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When is the change in entropy zero?
The change in entropy is zero when a process is reversible, meaning that the system and surroundings return to their original state without any net change in entropy.
According to the second law of thermodynamics does entropy increase in a cold system?
Yes, according to the second law of thermodynamics, entropy tends to increase in a closed system. In a cold system, if the temperature is below the surroundings, the heat can flow from the surroundings to the system, increasing the system's entropy.
Which thermodynamic law has to do with entropy?
The second law of thermodynamics is closely related to entropy, stating that the total entropy of an isolated system can never decrease over time. This law provides a direction for natural processes, indicating that systems tend to move towards higher entropy states.
What is the relationship between entropy and energy?
Entropy is a measure of disorder or randomness in a system, while energy is the capacity to do work. The relationship between entropy and energy is that as energy is transferred or transformed in a system, the entropy of that system tends to increase. This is known as the second law of thermodynamics, which states that in any energy transfer or transformation, the total entropy of a closed system will always increase over time.
Is the entropy of the universe increasing?
Yes, the entropy of the universe is increasing over time, according to the second law of thermodynamics. This law states that in any isolated system, the total entropy, or disorder, will always increase or remain constant, but never decrease.
When is the change in entropy zero?
The change in entropy is zero when a process is reversible, meaning that the system and surroundings return to their original state without any net change in entropy.
When does the change in entropy equal zero?
The change in entropy equals zero when a process is reversible, meaning that the system and surroundings return to their original state without any net change in entropy.
How can one determine the entropy change in a system?
One can determine the entropy change in a system by calculating the difference between the entropy of the final state and the entropy of the initial state, taking into account any heat transfer and temperature changes.
According to the second law of thermodynamics does entropy increase in a cold system?
Yes, according to the second law of thermodynamics, entropy tends to increase in a closed system. In a cold system, if the temperature is below the surroundings, the heat can flow from the surroundings to the system, increasing the system's entropy.
Why is burning an irriversible change?
Just like any other change, entropy increases. That means that you would need ADDITIONAL free energy to reverse the burning.
Which thermodynamic law has to do with entropy?
The second law of thermodynamics is closely related to entropy, stating that the total entropy of an isolated system can never decrease over time. This law provides a direction for natural processes, indicating that systems tend to move towards higher entropy states.
When someone order something don't he reduce entropy of the universe?
No. You can reduce the entropy of some system, but that will be at the cost of an entropy increase somewhere else. This is because it costs energy to put something in order. The TOTAL entropy in the Universe will always increase. For example, the entropy on planet Earth probably remains more or less constant over millions of years - but we do so using energy, mainly from the Sun, and the fact that energy from the Sun radiates into space is an increase of entropy; much greater than any small change of entropy on our planet.
How can one determine the free energy change in a system without any cost involved?
One can determine the free energy change in a system without any cost involved by using the equation: G H - TS, where G is the change in free energy, H is the change in enthalpy, T is the temperature in Kelvin, and S is the change in entropy. This equation allows for the calculation of free energy change based on the enthalpy and entropy changes in the system at a given temperature.
Which would represent an increase in entropy?
thawing
Will milk explode when put any mint candy?
No it will not explode.
What is heat death how you can relate this term to entropy?
Heat death is a hypothetical situation in which there is no more usable energy in the Universe. In relation to entropy, it means that entropy is at its maximum - it can't increase any more.
How do you calculate mixing Gas entropy?
The entropy of mixing is the change in theconfiguration entropy, an extensivethermodynamic quantity, when two differentchemical substances or components are mixed and the volume available for each substance to explore is changed. The name entropy of mixing is misleading, since it is not the intermingling of the particles that creates the entropy change, but rather the change in the available volume per particle.[1] This entropy change is positive when there is more uncertainty about thespatial locations of the different kinds ofmolecules. We assume that the mixing process has reached thermodynamic equilibrium so that the mixture is uniform and homogeneous. If the substances being mixed are initially at different temperatures and pressures, there will, of course, be an additional entropy increase in the mixed substance due to these differences being equilibrated, but if the substances being mixed are initially at the same temperature and pressure, the entropy increase will be entirely due to the entropy of mixing.The entropy of mixing may be calculated by Gibbs' Theorem which states that when two different substances mix, the entropy increase upon mixing is equal to the entropy increase that would occur if the two substances were to expand alone into the mixing volume. (In this sense, then the term "entropy of mixing" is a misnomer, since the entropy increase is not due to any "mixing" effect.) Nevertheless, the two substances must be different for the entropy of mixing to exist. This is the Gibbs paradoxwhich states that if the two substances are identical, there will be no entropy change, yet the slightest detectable difference between the two will yield a considerable entropy change, and this is just the entropy of mixing. In other words, the entropy of mixing is not a continuous function of the degree of difference between the two substances.For the mixing of two ideal gases upon removal of a dividing partition, the entropy of mixing is given by:(1)[tex]\Delta S = n1R\ln((V1+V2)/V1) + n2R\ln((V1+V2)/V2)[/tex]where is the gas constant, n1 and n2 are the number of moles of the respective gases and V1, V2 are their respective initial volumes. After the removal of the partition, each gas particle may explore a larger volume, which causes the entropy change. Note that this equation is only valid if both compartments have the same initial pressure.Note that the mixing involves no heat flow (just the irreversible process of mixing). However, the change in entropy is defined as the integral of dQ/T over the reversible path between the initial and final states. The reversible path between these two states is a quasi-static isothermal expansion. Such a path DOES involve heat flow into the gas: dQ = PdV = nRTdV/V where T is constant (dU = 0). The above equation (1) for entropy is determined by taking the integral of dQ/T over such a path.
