2024 Chemistry Key words

Activation energy - The minmum amount of energy required for a reaction proceed R - Energy released when the bond products form X - An unstable intermediate compound formed during the course of the reaction Delta H - change in enthalpy of heat in the reaction Net amount of energy absorbed or released during the reaction Energy of product - energy of reactants Catalyst - A substance that speeds up the rate of a chemical reaction by lowering the activation energy by taking it through an alternate path that uses less energy Homologous series - A group of compounds satisfying the same general formula Structural isomers - Organic compounds with the same molecular formula but with different structural formulae Hybridisation - The mixing of atomic orbitals to form a new hybrid orbital (with different energies, shapes etc) than the component atomic orbitals suited for the pairing of electrons to form chemical bonds Viscosity - A measure of the resistance a substance has to flow Vapour pressure - The pressure that the gas form of a substance exerts on the surface of its own liquid in a closed system Solubility - The maximum amount of solute that will dissolve in a certain amount of solvent at a given temperature Temperature - A measure of the average kinetic energy of the particles that make up a substance Boiling point - The temperature at which the vapour pressure of a liquid is equal to the atmospheric pressure One mole - The mass of a substance that contains the same number of particles as there are in 12g of the carbon 12 isotope Chemical bond - The attractive force that holds atoms or ions together