Chemistry AS Energetics

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  • Created by: Rebecca
  • Created on: 25-04-10 15:47

Enthalpy Change - the overall energy exchange with the surroundings and when a change happens at constant pressure and the final temperature is the same and the starting temperature.

Exothermic - gives out energy (in the form of heat) to the surroundings. The heat leaves the system like people exit a building. The enthalpy change is negative as the system has lost heat.

Endothermic - takes in energy from the surroundings. The enthalpy change is positive as the system has gained energy.

Standard enthalpy of a reaction - is the energy transferred when the molar quantities or reactants as stated react under standard conditions (i atmospheric pressure, 298k, substances in their most stable conditions, solutions with concentration of 1…




thank  you for putting that up.


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