E
Exothermic
AllChemicals — The Online Chemical Glossary | https://allchemicals.info/chemical/417-exothermic
What is Exothermic?
An exothermic process releases heat energy to the surroundings, resulting in a negative enthalpy change (ΔH < 0). Combustion reactions, neutralization of acids and bases, and the formation of most ionic compounds are common exothermic processes. The released energy heats the surroundings, causing a measurable temperature increase in the reaction mixture.
Key Facts
Term
Exothermic
Index
All "E" terms
Frequently Asked Questions
An exothermic process releases heat energy to the surroundings, resulting in a negative enthalpy change (ΔH < 0). Combustion reactions, neutralization of acids and bases, and the formation of most ionic compounds are common exothermic processes. The released energy heats the surroundings, causing a measurable temperature increase in the reaction mixture.
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°
View all "E" terms →
Editorial standards: Chemical data is sourced from peer-reviewed literature,
CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA,
and IAEA. For educational purposes only — always consult official SDS documentation and qualified
professionals before handling chemicals.