Enthalpy change of formation
- Standard enthalpy change of formation of a substance is the enthalpy change when one mole of a substance is formed from it's elements under standard conditions
Reversible reaction
- If the enthalpy change for a reaction is known, then the enthalpy change for the reverse reaction has the same magnitude but with the opposite sign
Determining enthalpy changes experimentally
Heat evolved = mC(delta)T
m is the mass of substance
c is the specific heat capacity
(delta)T is the temperature change
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