Calcolatore Variazione di Entropia
Calcola la variazione di entropia in processi termodinamici reversibili e irreversibili.
Entropy Change
3.3333 J/K
Entropy Change vs Heat Transferred
Formula
Entropy Change
Entropy measures the disorder or unavailability of energy in a system.
Formula
DeltaS = Q / T
for a reversible process at constant temperature. Positive DeltaS means entropy increases (heat absorbed). The second law states that total entropy of an isolated system never decreases.
Esempio Risolto
1000 J of heat absorbed at 300 K.
- 01DeltaS = Q / T
- 02DeltaS = 1000 / 300
- 03DeltaS = 3.333 J/K
Domande Frequenti
What is entropy in simple terms?
Entropy quantifies the number of microscopic arrangements a system can have. Higher entropy means more disorder and less available useful energy.
Can entropy decrease?
Locally, yes (a refrigerator decreases the entropy of its contents). But the total entropy of the universe always increases or stays the same.
What is the second law of thermodynamics?
The total entropy of an isolated system can only increase over time. Heat flows spontaneously from hot to cold, never the reverse.
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