Search results for “Mole”

Thermoplastic Biochemistry & Polymer Chemistry °C A polymer that softens on heating and hardens again on cooling, reversibly and repeatedly.

Three-Centre Two-Electron Bond Chemical Bonding & Molecular Structure kJ/mol A bond in which a single pair of electrons is shared between three atoms rather than two. A···H···B

Vapour Pressure States of Matter & Gas Laws Pa The pressure exerted by a vapour in dynamic equilibrium with its liquid or solid at a given temperature. ln p = −ΔH_vap / RT + C

Weak Acid Acids, Bases & Salts mol/L An acid that ionises only partially in aqueous solution, establishing an equilibrium with its conjugate base. HA ⇌ H⁺ + A⁻

Colligative Properties Solutions & Colligative Properties Various Solution properties that depend only on the number of dissolved solute particles, not on their chemical identity.

Degree of Polymerisation Biochemistry & Polymer Chemistry Dimensionless The number of monomer units in an average polymer chain. DP = M_polymer / M_monomer

Dimensional Analysis Foundations of Chemistry Various A calculation method that tracks and cancels units through a chain of conversion factors to reach the required quantity. given quantity × (desired unit / given unit) = answer

Enthalpy of Reaction Thermochemistry & Thermodynamics kJ/mol The heat absorbed or released when a reaction occurs at constant pressure in the molar amounts of the balanced equation. ΔH_rxn = ΣΔH_f(products) − ΣΔH_f(reactants)

Extensive Property Foundations of Chemistry Various A property whose value is directly proportional to the quantity of matter in the sample.

Group Atomic Structure & Periodicity Dimensionless A vertical column of the periodic table whose members share the same valence electron configuration.

Ideal Gas Law States of Matter & Gas Laws Various The equation of state relating the pressure, volume, amount and absolute temperature of an ideal gas. pV = nRT

Le Chatelier's Principle Chemical Equilibrium Dimensionless When a system at equilibrium is disturbed, it responds in the direction that partially opposes the disturbance.

Lewis Theory Acids, Bases & Salts Dimensionless The theory defining an acid as an electron pair acceptor and a base as an electron pair donor. A + :B → A←B

Organic Chemistry Organic Chemistry Dimensionless The study of the structure, properties, composition and reactions of carbon-containing compounds.

Pre-exponential Factor Chemical Kinetics & Catalysis Various The constant A in the Arrhenius equation, representing the frequency of appropriately oriented collisions. A = pZ

Stoichiometric Mixture Stoichiometry & Chemical Reactions mol A mixture of reactants present in exactly the proportions required by the balanced equation, with no reactant in excess. n_A : n_B = a : b

Results for “Mole”