Energetics Flashcards
Endothermic reactions…
Take in energy from surroundings
What do products and reactants mean in an endothermic reaction
Products have more energy than reactants
What is bond enthalpy
The energy needed the break a bond
What are bond enthalpy dependent on
Which atoms are attached on either side of the bond
What standard conditions is enthalpy measured in
100kpa pressure
298k temp
What is standard change of formulations
One mole of a compound is formed from its elements in their standard states under standard conditions
What is the standard change of combustion
When one mole of substance is completely burnt in oxygen under standard conditions with all reactants and products in standard states
What is Caloirmetry
An experiment for finding enthalpy change by measuring temperature change over time
What is Hess law
The total enthalpy change for a reaction is independent of the route take
