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Results tagged with entropy
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user 22623
For questions about the thermodynamical state function entropy, commonly understood as a measure of disorder.
3
votes
Accepted
Understanding entropy / spontaneity
The entropy of the universe increases for any spontaneous process. … If we assume the entropy of the system is negative (like the book does) then the entropy of the surroundings must be positive and greater. …
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Is entropy change of the system for reversible process same as entropy change of the system ...
Being a state function, entropy is independent of path, so the entropy change of the system is indeed the same for both a reversible and an irreversible process. … same regardless of process, but the entropy change of the environment is indeed different, such that the total entropy change is greater for an irreversible process than for a reversible process. …
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An equal amount of hydrogen gas is dissolved in a 1L vessel and a 2L vessel, both filled wit...
Increasing the volume will increase the number of microstates available to the system, and hence also the entropy. … Increasing the moles of water will increase the number of microstates available to the system, and hence also the entropy.
Both statements imply that Vessel II has the greater entropy. …
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1
vote
Accepted
How does the concentration of a gas affect the entropy of a system in a chemical equilibrium?
I think "decreasing the concentration of the gas" is supposed to imply "adding an inert gas to the container", which would certainly increase the entropy. … The entropy of mixing is positive.)
This is indeed poor wording. …
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1
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How to derive the relation between entropy and heat described by the equation dS=dq/T?
This is the expression for the Boltzmann entropy. … The Gibbs entropy is a generalization of the Boltzmann entropy to canonical, rather than microcanonical, ensembles: take the total entropy (which you cannot measure in practice, not being aware of the …
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3
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Entropy and enthalpy at the melting point of benzene
Most substances will indeed have a positive entropy of fusion, as is suggested by your reasoning above. … One notable exception, however, is helium at near-zero Kelvin temperatures, where it has a negative entropy of fusion. …
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19
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Why is entropy favorable?
I find statements like "entropy drives the system towards a particular state" to be somewhat misleading, because they imply that entropy behaves like a force. … But entropy, as we've seen, is really just statistics. …
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