BIO 1130 Lecture Notes - Lecture 12: Endergonic Reaction, Exergonic Reaction, Exothermic Process

• School: University of Ottawa
• Department: Biology
• Course: BIO 1130
• Professor: Gambarotta Sandro

Document Summary

Photosynthetic sea slug that converts from auto to heterotrophic: gains chloroplasts from the algae it eats. Why do we eat: 1500kcal/day, mostly to maintain order in our cells. Total amount of energy (h- enthalpy) = usable energy (g- free energy) + unusable energy (s- entropy) G(energy available to do work) = h-ts: spontaneous reaction occur without an input of energy, for a reaction to occur spontaneously in must increase the entropy of the system (spontaneous does(cid:374)"t (cid:373)ea(cid:374) fast only that it will happen) G can be used to predict whether a reaction is spontaneous: g<0 means spontaneous, g>or = 0means not spontaneous la(cid:396)ge h (cid:272)a(cid:374) (cid:373)ea(cid:374)s a la(cid:396)ge(cid:396) g. Free energy is also a measure of stability. Equilibrium: is maximum stability: o(cid:396)ga(cid:374)is(cid:373)s (cid:396)ea(cid:272)h e(cid:395)uili(cid:271)(cid:396)iu(cid:373) g (cid:449)he(cid:374) the(cid:455) die. Exergonic rea(cid:272)tio(cid:374): (cid:449)he(cid:396)e g is (cid:374)egati(cid:448)e (cid:271)e(cid:272)ause p(cid:396)odu(cid:272)ts (cid:272)o(cid:374)tai(cid:374) less f(cid:396)ee e(cid:374)e(cid:396)g(cid:455) that (cid:396)ea(cid:272)ta(cid:374)ts. E(cid:374)de(cid:396)go(cid:374)i(cid:272) (cid:396)ea(cid:272)tio(cid:374): (cid:449)he(cid:396)e g is positi(cid:448)e (cid:271)e(cid:272)ause p(cid:396)odu(cid:272)ts (cid:272)o(cid:374)tai(cid:374) (cid:373)o(cid:396)e f(cid:396)ee e(cid:374)e(cid:396)g(cid:455) tha(cid:374) (cid:396)ea(cid:272)ta(cid:374)ts.