Using heats of formation to calculate the overall heat gained or lost in a chemical reaction is really just an expression of… Group of answer choicesThe Pauli Exclusion PrincipleEinstein's Theory of RelativityHess's LawPascal's Law
Question
Using heats of formation to calculate the overall heat gained or lost in a chemical reaction is really just an expression of… Group of answer choicesThe Pauli Exclusion PrincipleEinstein's Theory of RelativityHess's LawPascal's Law
Solution
The correct answer is Hess's Law. This law states that the total enthalpy change during the complete course of a chemical reaction is the same whether the reaction is made in one step or in several steps. In other words, if a chemical change takes place by several different routes, the overall enthalpy change is the same, regardless of the route by which the chemical change occurs. This is why we can use heats of formation to calculate the overall heat gained or lost in a chemical reaction.
Similar Questions
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