LIFESCI 2 Lecture Notes - Lecture 2: Melanin, Arginase, Ammonia
Document Summary
Energy: ability to do work: kinetic energy: energy of motion a. i. Light, heat (measure of the motion of molecules), electricity (motion of electrons through a wire: potential energy: stored energy that can be converted to kinetic energy b. i. Energy of chemical bonds, gravity, energy across concentration gradients. Thermodynamics: study of the flow of energy: first law: can change one form of energy to another a. i. Law of conservation of energy applies: second law: the transformation, although it doesn"t lose energy, the amount of energy available to do work decreases over time b. i. By the end of time, there"s no usable energy b. ii. 1. Through every transformation of energy, we lose a bit of usable energy. Free energy: usable energy (g) in a chemical reaction: delta g is the change in usable energy, negative delta g some of the energy is released (spontaneous or exergonic reaction) b. i. May capture some of that usable energy & put it into another reaction b. ii.
