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Vocabulaire pour l'IELTS Academic (Score 8-9) - Chemistry

Ici, vous apprendrez quelques mots anglais liés à la chimie qui sont nécessaires à l'examen académique IELTS.

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Vocabulary for Academic IELTS (8)
solute
[nom]

a substance that is dissolved in a solvent, resulting in a solution

soluté, substance dissoute

soluté, substance dissoute

Ex: Dissolving a pain reliever ( e.g. , aspirin ) in water results in the drug acting as solute in the liquid solvent .

a substance that takes part in and undergoes a chemical reaction, leading to the formation of new products

réactif, substance réactive

réactif, substance réactive

Ex: When iron reacts with sulfur , reactants are iron and sulfur .

(chemistry) a substance that causes a chemical reaction to happen at a faster rate without undergoing any chemical change itself

catalyseur

catalyseur

Ex: In the Haber process , iron is used as catalyst to promote the synthesis of ammonia from nitrogen and hydrogen gases .

the acceleration or facilitation of a chemical reaction by a substance (catalyst) that remains unchanged at the end of the reaction

catalyse, catalytique

catalyse, catalytique

Ex: Zeolites act as catalysts in refining processes , promoting catalysis of hydrocarbons into valuable products .

a chemical bond where atoms share electrons to form a stable molecule

lien covalent, liaison covalente

lien covalent, liaison covalente

Ex: The air 's like a molecular community , held together covalent bonds, forming a breathable atmosphere .
isomer
[nom]

any of two or more compounds having the same molecular formula but different arrangements of atoms and, consequently, different properties

isomère, isomérique

isomère, isomérique

Ex: The amino acid isoleucine and the sugar maltose are examples isomers with identical molecular formulas but differing chemical structures .
polymer
[nom]

a large molecule composed of repeating structural units, or monomers, covalently bonded together in a chain-like structure

polymère, polyéthylène

polymère, polyéthylène

Ex: Polyester is a versatile polymer used in fabrics , clothing , and plastic bottles .
monomer
[nom]

a molecule that can chemically bond with other molecules to form a polymer

monomère, monomère de base

monomère, monomère de base

Ex: Styrene is monomer used in the production of polystyrene , a common plastic and insulation material .

a compound composed of hydrogen and carbon atoms, with the simplest form being alkanes, alkenes, or alkynes

hydrocarbure, composé hydrocarboné

hydrocarbure, composé hydrocarboné

Ex: Benzene (C₆H₆) is an aromatic hydrocarbon, exhibiting a ring structure with alternating single and double bonds.
ester
[nom]

a chemical compound derived from the reaction between an alcohol and an organic acid, typically with the elimination of water

ester, estérifier

ester, estérifier

Ex: Ethyl propionate is ester with a fruity odor and is used as a flavoring agent in the food industry .

an organic compound with a carbonyl group (C=O) bonded to a hydrogen atom and another carbon atom, commonly found in essential oils and used in various chemical processes

aldéhyde, carbonyle

aldéhyde, carbonyle

Ex: Formaldehyde is a aldehyde used in various industrial applications , including the production of resins .
alcohol
[nom]

a compound with a hydroxyl group (-OH) attached to a carbon atom, widely used as solvents, fuels, and in pharmaceutical and chemical synthesis

alcool, éthanol

alcool, éthanol

Ex: alcohol is used in the production of fragrances , flavorings , and as a solvent in various applications .
ketone
[nom]

an organic compound with a carbonyl group (C=O) bonded to two carbon atoms, commonly found in solvents, pharmaceuticals, and flavorings

cétone, kéton

cétone, kéton

Ex: Camphor is ketone found in various plant sources and used in medicinal and flavoring applications .

a chemical reaction where electrons are transferred between substances

réaction d'oxydation-réduction, réaction redox

réaction d'oxydation-réduction, réaction redox

Ex: Photosynthesis is a biological process that involves oxidation-reduction of water and carbon dioxide to produce glucose and oxygen .

the concentration of a solute in a solution, measured in moles per liter (mol/L or M)

molarité, concentration molaire

molarité, concentration molaire

Ex: Hydrogen peroxide with molarity of 6 M means there are 6 moles of H₂O₂ per liter .

a substance that, when dissolved in a solution, produces ions and enables the conduction of electric current

électrolyte, substance électrolytique

électrolyte, substance électrolytique

Ex: Acetic acid (CH₃COOH) is a weak electrolyte, producing acetate ions (CH₃COO⁻) and hydrogen ions (H⁺) in solution.

a thermodynamic quantity representing the total heat content of a system, commonly denoted as H

enthalpie, contenu thermique

enthalpie, contenu thermique

Ex: Enthalpy plays a role in the analysis of reaction spontaneity , where negative ΔH values often indicate spontaneous processes .
entropy
[nom]

a thermodynamic measure of the degree of disorder or randomness in a system, denoted by S

entropie, désordre thermodynamique

entropie, désordre thermodynamique

Ex: Dissolving a solute in a solvent generally increases entropy of the system .
colloid
[nom]

a mixture where small particles of one substance are evenly dispersed in another substance, typically intermediate in size between solution and suspension particles

colloïde, colloïde

colloïde, colloïde

Ex: Blood plasma is colloid with proteins and other substances dispersed in water .

the gradual destruction of materials by chemical reaction, usually of metals

corrosion, rouille

corrosion, rouille

Ex: Exposure to moisture accelerates corrosion.
alkali
[nom]

any substance with a pH of more than seven that neutralizes acids creating salt and water

alcali

alcali

Ex: Alkalis are often used in the production of soaps, detergents, and other cleaning agents due to their ability to dissolve fats and oils.
Vocabulaire pour l'IELTS Academic (Score 8-9)
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