BCHM 310 Study Guide - Quiz Guide: Acid Dissociation Constant, Acid Strength, Exothermic Process

• School: Queen's University
• Department: Biochemistry
• Course: BCHM 310
• Professor: Glenville Jones

Document Summary

Quiz 1 = key concepts from week 1. Determined by the system, not the surrounding environment in a reaction. A system that releases heat to the surroundings, an exothermic reaction, has a negative. H because the enthalpy of the products is lower than the enthalpy of the reactants of the system. A system of reactants that absorbs heat from the surroundings in an endothermic reaction has a positive h because the enthalpy of the products is higher than the enthalpy of the reactants of the system. Measure of disorder or randomness of the particles in a thermodynamic system. The greater the disorder of the particles the more positive the change in entropy ( s) will be. Less disorder results in more negative entropy. The larger ka implies more dissociation of ha and so the stronger the acid. The larger ka is, the more negative the pka so the lower the pka, the stronger the acid.