Enthalpy Flashcards
enthalpy equation
the heat constant that is stored in a chemical system
exothermic reaction
chemical system is losing energy
surrounding heat up
more energy given out then taken in
enthalpy is negative
endothermic reaction
energy is taken in from surroundings
system is gaining energy
decrease in temperature pf surroundings
more energy taken n the break bonds than given out when new bonds are formed
enthalpy is positive
Activation energy
minimium amount of energy required to start a reaction
what needs to happen for a reaction to occur
particles need to collide
enthalpy change of formation
enthalpy change that takes place when one mole of a compound formed from its elements under standard conditions and all reactants and products are in their standard states
enthalpy change of combustion
enthalpy change that takes place when one mole of a substance reacts completely with O2 under standard conditions with all reactants and products in their standard states
enthalpy change of neutralisation
enthalpy change that accompanies the reaction of an acid with a base to form 1 mole of water under standard conditions and with all reactants and products in their standard states
