Energy changes and Reversible reactions Flashcards
Exothermic
A reaction that gives out heat
Endothermic
A reaction that takes in heat
Is breaking bonds exo/endothermic?
Endothermic
Is making bonds exo/endothermic?
Exothermic
Examples of exothermic
Burning
Neutralisation reactions
Acid + metal
Exothermic change diagram
Reactants have more energy than products
Heat evolved is the difference between Reactant/product
Exothermic deltaH
Negative number, losing heat
What doe deltaH mean
Change in enthalpy
Endothermic change diagram
Reactants lower than the products heat absorbed the difference
Thermal decomposition
Endothermic
La Chatelier’s Principle
If the dynamic equilibrium is disturbed by changing the conditions the reaction moves the counteract the change.
Dynamic Equilibrium
Constant amounts of a continuing reaction
Increasing the temperature
Favours Endothermic reaction
Decreasing the temperature
Favours Exothermic reaction
Rate of forward reaction is
equal to the backwards reaction