Physical Chemistry - Energetics (Paper 2)
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how would you draw an energy level diagram for an exothermic reaction?
reactants are drawn higher than products as they have more energy enthalpy change is drawn as a downwards arrow, as reactants are losing energy as heat
how would you draw an energy level diagram for an exothermic reaction?
reactants are drawn lower than products as they have less energy enthalpy change is drawn as an upwards arrow, as reactants are gaining energy
what type of processes are bond breaking and bond making?
bond breaking is endothermic as breaking bonds needs energy bond making is exothermic as when new bonds are made energy is released
how do you calculate enthalpy change with bond energies?
Enthalpy change, ΔH = Energy needed to break all the bonds - Energy released to make all the new bonds