Rate of Reaction: Change in concentration of a reactant used up or product formed in a given time. • Calculating Rate of Reaction: Rate (mol dm-3 s -1 ) = change in concentration (mol dm-3 ) / time (s). Time on x axis. • Working out rate of anything is change in...
Catalyst: A catalyst provides an alternative reaction pathway for reaction with lower activation energy. Catalyst regenerated/ not used up. Increases rate of reaction. Enthalpy Profile Diagrams: Reactants and product should be shown at correct levels with respect to...
Elastic Collisions: Molecules in gas move at high speed and collide with each other. Collisions are elastic as molecules do not slow down as a result of collision so no energy lost. • Energy of Molecules: In gas, liquid, or solution, some molecules move slowly with...
Reversible Reactions: A reaction that takes place in both forward and reverse directions if reversible. Equilibrium only in reversible reactions. • Dynamic Equilibrium System: Equilibrium that exists in a closed system when rate of forward reaction is equal to rate of...
Equilibrium Constant: Kc. A measure of the position of equilibrium. • Equilibrium Law: Square brackets shorthand for ‘concentration of’. a, b, c and d are balancing numbers- the powers. A, B, C and D are the equilibrium concentrations of products and reactants. •...