Chemistry 0.0 / 5 ? ChemistryModule 3.2ASOCR Created by: Tyler-Louise2001Created on: 07-04-18 13:22 Chemical Energy A form of potential energy that lies within chemical bonds 1 of 21 Enthalpy The thermal energy that is stored in a chemical system 2 of 21 Enthalpy Change The heat exchange with the surroundings during a chemical reaction, at constant pressure 3 of 21 Exothermic Reaction The enthalpy of the products produced is smaller than the enthalpy of the reactants 4 of 21 Endothermic Reactions The enthalpy of the products produced is greater than the enthalpy of the reactants 5 of 21 Activation Energy The minimum energy required to start a reaction by breaking bonds in the reaction 6 of 21 Enthalpy Change of Reaction The energy change associated with a given reaction 7 of 21 Enthalpy Change of Formation The energy change that takes place when 1 mole of a compound is formed from its constituent elements in their standard state under standard conditions 8 of 21 Enthalpy Change of Combustion The energy change that takes place when 1 mole of a substance is completely combusted 9 of 21 Enthalpy Change of Neutralisation The energy change associated with the formation of 1 mole of water from a neutralisation reaction 10 of 21 Calorimetry The quantitative study of energy in a chemical reaction 11 of 21 Specific Heat Capacity The energy required to raise the temperature of 1g of a substance by 1 K 12 of 21 Average Bond of Enthalpy The mean energy needed for 1 mole of a give type of gaseous bonds to undergo homolytic fission 13 of 21 Hess's Law States that the enthalpy change in a chemical reaction is independent of the route it takes 14 of 21 Enthalpy Cycle A pictorial representation shwoing alternative routes between reactans and products 15 of 21 Rate of reaction The change in concentration of a rectnt or a proudct in a given time 16 of 21 Catalyst A substance that increases the rate of reaction without being used up in the process 17 of 21 Homogeneous Catalyst When the catalyst for a reaction is in the same phase as the reactants 18 of 21 Heterogeneous Catalyst When the catalyst for a reaction is in a different phase from the reactants 19 of 21 Boltzmann distribution The distribution of energies of molecules at a particular temperature 20 of 21 Equilibrium There is no observable change to a reaction 21 of 21
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