Everything Chem

2 contd rate always has units lets leave b constant

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Unformatted text preview: (kJ/mol) Chapter 4.3 Cont’d Example (in this case the melting and boiling points were converted to KJ/g) Rule of Thermochemistry; 1. The magnitude of ΔH is directly proportional to the amount of reactant consumed ΔH = n(reactant) X ΔH 2. ΔH for a reaction is equal in magnitude but opposite in sign to ΔH of the reverse reaction. When 1 mol of ice melts, 6.00kJ are absorbed 3. The value ΔH for a reaction is the same whether it occurs in one step or in a series. The third law is known as Hess’s Law; Chapter 4.4 Enthalpy of Combustion and Formation - Enthalpy change associated with the combustion of a compound (kJ/mol) for compounds containing C and H only. - Standard state of a substance: is the state in which exists at 25°...
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