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Entropy measures disorder or randomness in a system. The second law of thermodynamics states that entropy in an isolated system always increases over time.

Formule

The calculator applies ΔS = Q_rev / T

T: T value — Variable used in the calculation

Guide étape par étape

1Enter system parameters: heat transferred and absolute temperature for reversible processes
2The calculator applies ΔS = Q_rev / T
3Results show entropy change in J/K

Exemples résolus

Entrée

Q = 1000 J, T = 300 K

Résultat

ΔS ≈ 3.33 J/K

Entropy increase from heat transfer

Erreurs courantes à éviter

✕Using Celsius instead of Kelvin temperature
✕Confusing entropy with energy

Questions fréquentes

Can entropy decrease?

Not in isolated systems; local entropy can decrease only if overall system entropy increases elsewhere.

Why is entropy related to disorder?

Higher entropy states have more possible molecular arrangements; organized systems have fewer arrangements.

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