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What is the enthalpy change for a gas phase chemical reaction?
ΔrH
ΔrH formula. In order word, how can we calculate Enthalpy change for a gas phase reaction?
ΔrH = Sum of Bonds broken (endothermic) - Sum of bonds formed (Exothermic)
Based off the formula of ΔrH= SUM OF BONDS BROKEN - SUM OF BONDS FORMED. Explain why we might a negative enthalpy as our final answer?
The bonds in the products side is stronger than the reactants therefore we get a negative enthalpy
What is the standard state reaction formula?
This is the ΔrH= H. Products - H. Reactants
What is Hess’s Law?
The enthalpy change for a reaction is independent of the route taken
What is ΔH of formation?
ΔH change that occurs when 1 mole of a substance is formed from its constituent element in their standard state under standard conditions
