Lec12_drobny_11

# Lec12_drobny_11 - Lecture 12: E° cell and Δ G •...

This preview shows pages 1–7. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Lecture 12: E° cell and Δ G • Reading: Zumdahl: 11.3 • Recommended Problems:11.31, 11.33, 11.35, 11.37, 11.39 • Outline – E° cell and work – E° cell and Δ G E° cell and work • A galvanic electrochemical cell generates a fow oF electrons From the anode (where oxidation occurs) to the cathode (where reduction occurs). • This fow oF electrons (current) can be used to perForm work on the surroundings. E° cell and work (cont.) • From the defnition o¡ electromotive ¡orce (em¡): • In English: 1 J o¡ work is done when 1 C o¡ charge is trans¡erred between a potential di¡¡erence o¡ 1 V. • Note: electron charge=1.60x10-19 C Volt = work (J)/charge (C) E° cell and work (cont.) • Recall, we have a system-based perspective such that work done by the system is negative : E° cell = - w/q w = work q = charge (not heat) • Rearranging: qE° cell = - w • An example: What is the amount of work that is done by a galvanic cell in which 1.5 moles of electrons are passed between a potential of 2 V? E° cell and work (cont.) qE° cell = - w (1.5 mol e- )(2 V) = - w What do we do with this? E° cell and work (cont.) • The Faraday (F)=the charge of one mole of electrons: F=eN A =(1.60x10-19 C)(6.02x10 23 mol-1 ) 1 F = 96,485 C/mol...
View Full Document

## This note was uploaded on 01/18/2012 for the course CHEM 152A taught by Professor Chiu during the Fall '12 term at University of Washington.

### Page1 / 20

Lec12_drobny_11 - Lecture 12: E° cell and Δ G •...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online