E
Endothermic
AllChemicals — The Online Chemical Glossary | https://allchemicals.info/chemical/399-endothermic
What is Endothermic?
An endothermic process is one in which a system absorbs heat energy from its surroundings, resulting in a positive enthalpy change (ΔH > 0). Examples include the melting of ice, the dissolution of ammonium nitrate in water, and photosynthesis. Because heat is consumed, the surroundings feel cooler during an endothermic reaction.
Key Facts
Term
Endothermic
Index
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Frequently Asked Questions
An endothermic process is one in which a system absorbs heat energy from its surroundings, resulting in a positive enthalpy change (ΔH > 0). Examples include the melting of ice, the dissolution of ammonium nitrate in water, and photosynthesis. Because heat is consumed, the surroundings feel cooler during an endothermic reaction.
More "E" Terms
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°
Electrochemistry
Electrode
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