E
Entropy
AllChemicals — The Online Chemical Glossary | https://allchemicals.info/chemical/403-entropy
What is Entropy?
Entropy (S) is a thermodynamic state function that measures the degree of disorder or randomness in a system. According to the second law of thermodynamics, the total entropy of the universe increases in all spontaneous processes. The third law states that the entropy of a perfect crystal at absolute zero is zero. Entropy is measured in joules per kelvin (J/K).
Key Facts
Term
Entropy
Index
All "E" terms
Frequently Asked Questions
Entropy (S) is a thermodynamic state function that measures the degree of disorder or randomness in a system. According to the second law of thermodynamics, the total entropy of the universe increases in all spontaneous processes. The third law states that the entropy of a perfect crystal at absolute zero is zero. Entropy is measured in joules per kelvin (J/K).
More "E" Terms
1-Ethyl-3-(3-dimethylaminopropyl)carbodiimide
C8H18ClN3
2-Ethoxyethanol
C4H10O2
Effective Collisions
Effective Collisions
E ≥ Ea (activation energy required)
Effective Molality
m_eff = i × m (van't Hoff factor)
Effective Nuclear Charge
Z_eff = Z − σ (Slater's rules)
Efflorescence
Hydrated salt losing water in air: M·nH₂O(s) → M·(n-x)H₂O(s) + xH₂O(g)
Einsteinium
Es
Electrical Conductivity
κ = 1/ρ; Λm = κ/c
Electrochemical Cell
Galvanic cell: ΔG = −nFE_cell; Electrolytic cell: ΔG = +nFE_applied
Electrochemical Series
Arranged by E° (standard reduction potential); SHE: E° = 0.00 V
Electrochemistry
E° cell = E° cathode − E° anode | ΔG° = −nFE°
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