Karteikarten
Energy
Karten in diesem Stapel (20)
- 1Bond enthalpyenthalpy change that takes place when breaking by homolytic fission 1 mol of a given bond in the molecules of a gaseous species
- 2le Chatelier's principlestates that when a system in dynamic equilibrium is subjected to a change, the position of equilibrium will shift to minimise the change
- 3Dynamic equilibriumthe equilibrium that exists in a closed system when the rate of the forward reaction is euql to the rate of the reerse reaction
- 4Boltzmann Distributiondistribution of energies of molecules at a particular temperature
- 5Homogeneous catalysiscatalysis of a reaction in which the catalysts and reactants are in the same physical state
- 6Heterogenous catalysiscatalysis of a reaction in which the catalyst has a different physical state from the reactants
- 7Rate of reactionthe change in concentration of a reactant or product in a given time
- 8Enthalpy cyclea diagram showing alternative routes between reactants and products which allows the indirect determination of an enthalpy change from other known enthalpy changes using Hess' Law
- 9Hess' Lawif a reaction can take place by more than one route and the initial and final conditions are the same, the total enthalpy change is the same for each route
- 10Average bond enthalpythe average enthalpy change that takes place when breaking by homolytic fission 1 mol of a given type of bond in the molecules of a gaseous species
- 11Enthalpythe heat content that is stored in a chemical systen
- 12Specific heat capacitythe energy required to raise the temperature of 1g of a substance by 1 degrees
- 13Standard enthalpy change of formationthe enthalpy change that takes place when one mole of a compounds is formed from its constituent elements in their standard states under standard conditions
- 14Standard enthalpy change of combustionthe enthalpy change that takes place when one mole of a substance reacts completely with oxygen under standard conditions, all reactants and products being in their standard states
- 15Standard statephysical state of a substance under standard conditions of 100kPa and 298K
- 16Standard conditionsa pressure of 100kPa, a stated temperature usually 298K and a concentration of 1.0moldm-3
- 17Activation energythe minimum energy required to start a reaction by the breaking of bonds
- 18Enthalpy profile diagramis a diagram for a reaction to compare the enthalpy of the reactants with the enthalpy of the products
- 19Endothermica reaction in which the enthalpy of the products is greater than the enthalpy of the reactants, resulting is heat being taken in from the surroundings (+ve)
- 20Exothermica reaction in which the enthalpy of the products is smaller than the enthalpy of the reactants, resulting in heat loss to the surroundings (-ve)
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- Undergraduate Chemistry - Part 2 (Energy) Karteikarten am Energy, erstellt von siobhan.quirk am 24/05/2013.
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