Terms
Actual yield
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The amount of product that is actually produced in a chemical reaction.
Endothermic reaction
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A reaction that requires heat energy to be carried to completion.
Enthalpy
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The amount of heat a substance has at a given temperature and pressure.
Excess reagent
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The reactant that is in excess in a chemical reaction. There is more than
enough of it to react with the other reactant(s).
Exothermic reaction
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A reaction that releases energy in the form of heat.
Heat of reaction
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The change in enthalpy in a chemical reaction.
Limiting reagent
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The reactant that limits or determines the amount of product that can be formed
in a chemical reaction.
Percent yield
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The decimal percentage resulting from dividing actual yield by theoretical
yield.
Standard heat of formation
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Unique to every substance, it is a measure of the change in enthalpy in the
reaction that produces 1 mole of the substance from its constituent elements.
Theoretical yield
-
The calculated or expected amount of product to be formed in a chemical
reaction.
Thermochemical reaction
-
Chemical reactions that include the amount of heat energy produced or absorbed.
Formulas
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Formula for Percent Yield
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Percent Yield =  |
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δH
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| δH = δHf (products) - δHf (reactants) |
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Conversion Factor between kJ and kcal
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