energetics (paper 2) 55, 58
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what do reaction profiles show
the relative energies of the reactants and products in a reaction and how the energy changes over the course of the reaction
describe what an exothermic energy profile looks like
• the reactants line is higher than the products • draw a loop/arch very from the reactants and products line • an arrow going from the reactants to the top of the loop/arch to show activation energy • an arrow going from the reactants to the products to show ΔH
describe what an endothermic energy profile looks like
• the reactants line is lower than the products • draw a loop/arch going above the line for products and thenn connecting • an arrow going from the reactants to the top of the loop/arch to show activation energy • a line going up from reactants to products to show ΔH
what can bond energy calculatios be used for
to calculate the energy change that occurs during a reaction
what is meant by the term bond energy
the amount of energy required to break 1 mole of a particular covalent bond
what is the calculation for bond energy
ΔH = reactant bonds - products bonds