enthalpy

enthalpy

the heat content that is stored in a chemical system
chemical energy
1. special form of potential energy that lies within chemical bonds
conservation of energy
1. amount of heat leaving chemical system = amount of heat being given to the surroundings
2. heat loss in chemical system = heat gain to surroundings
  1. temperature increase
3. heat gain in chemical system = heat loss from the surroundings
  1. temperature decrease
enthalpy change
1. the heat exchange with the surroundings during a chemical reaction, at a constant pressure
2. difference between the enthalpy of the products and the enthalpy of the reactants
exothermic
1. enthalpy of the products< the enthalpy of reactants
2. heat loss to from the chemical system to the surroundings
3. -ve sign coz heat has been lost
endothermic
1. enthalpy of the products>the enthalpy of the reactants
2. heat gain to the chemical system from the surroundings
3. +ve sign coz of heat gain

Resource summary

	Created by prisillajohnson9 almost 11 years ago