CHEM 104 Study Guide - Midterm Guide: Reaction Mechanism, Hydrogen Bond, Activation Energy
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Note: this is not a comprehensive review and should not be your only study material. Please refer to class notes, challenge problems, practice exams, and exam objectives for a full review. Catalyst: increases rate; changes the reaction mechanism by lowering the activation energy; faster than the slow step for an uncatalyzed reaction (see pg 644 in text) Enzyme: highly efficient catalyst for one or more chemical reactions in a living system, mostly proteins that have specificity for certain substrates. Substrate: molecule whose reaction is catalyzed by an enzyme. Active site: part of the enzyme that interacts with the substrate through noncovalent interactions such as hydrogen bonding, dipole-dipole forces, etc. Inhibitor: a molecule or ion that can fit in the enzyme"s active site but remains there unreacted, destroying the activity of the enzyme. E = q + w (change in energy equals heat plus work) w>0 if surroundings do work on the system q>0 if surroundings heat system.
