Class Notes (809,434)
Canada (493,711)
Chemistry (602)
CHEM 205 (62)
All (12)
Lecture 15

Lecture 15 Full notes

4 Pages
Unlock Document

University of British Columbia
CHEM 205

Lecture 15: Electrochem • Goal: produce electrical work OR use energy to drive a chemical reaction forward • Max non-expansion work=ΔG at constant T, P, for reversible process (since reversible processes give max G) • ***ΔG° for an element=0. UGH. • Electrical work=work to move n moles of electrons thru electrical potential difference(E in volts)=total charge x potential difference • W=-n*e*Avogadro*E o ΔG p,T-nFE where F=Avogadro *e o E=emf which is a potential difference o G depends on the MOLES of each while E does not change with changes in moles • Electrochemical cell=oxidation, reduction occurs spatially separated o 2 electrodes: anode, cathode in electrolyte, connect with salt bridge if needed. o Galvanic cell=produce electricity using spontaneous chem. Reaction aka ΔG<0 o Electrolytic cell=reaction driver by external source of current • ANODE=where anions go=where oxidation takes place=elections lost • CATHODE=where cations go=where reduction occurs=electrons gained • Half reactions used to write redox reactions o Always written as reductions o Number of electrons exchanged must be balanced o Convention: write reaction as being spontaneous when proceeding from Left to Right • When batter
More Less

Related notes for CHEM 205

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.