CHEM1831 Lecture Notes - Lecture 14: Reaction Rate Constant, Rate-Determining Step, Chemical Equation
9 Aug 2018
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Exponentials - always positive answers even if you calculate the exponential of a negative value: exponentials of positive numbers are greater than 1, exponentials of negative values are greater than 0 but less than one. Logarithms - are the inverse of exponentiation: can give positive or negative results depedning on wether the number you are calculating is ,<1 or > 1. Rates of reactions: chemical kinetics is the study of the rates or speed of chemical reactions. Few reactions happen within seconds, most are much slower: enzymes are chemicals that increase the speed of a chemical, e. g organisms have an enzyme called catalase that makes a reaction go more than. For a reactions a b + 2c, the rate of formation of c is twice the rate of formation of b. At anytime, the reaction procees: d[c]/dt = 2 x d[b]/dt = -2 x d[a]/dt. This could lead to ambiguity in the definition of the rate.
