HSS 2305 Lecture Notes - Lecture 3: Gibbs Free Energy, Exergonic Reaction, Atp Hydrolysis

• School: University of Ottawa
• Department: Health Sciences
• Course: HSS 2305
• Professor: Shannon Bainbridge

Document Summary

Need to exist in different conformations to grab stuff and other functions (open and close for the reaction to happen) Thermodynamics= study of changes of energy (never lose energy) Transduction= energy is not created or destroyed, converted into different forms (conservation of energy) Equation: e (internal energy) = q (heat energy) w (work energy) Energy has direction and proceed from higher energy state to lower energy state. This happens spontaneously; without the input of external energy, thermodynamically favorable. Tendency for randomness/disorder to increase whenever there is a transfer of energy. Entropy= measure of randomness or disorder (universe is expanding and always disordered, to make something more ordered, have to use energy) In a spontaneous reaction, enthalpy (h) decreases. Photosynthesis is endergonic because it requires energy. Low amount of energy to start with. Stores energy at the end of the reaction. Every event is accompanied by an increase in the entropy of the universe.