This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: the wire is 0.04 V? What is current density? What is the magnitude of electric field across the ends of the wire? A l R = IR V = A I j = l V E = AT T + = Al =3.8x10 7 ( m)-1 2. At temperatures between 540 o C and 727 o C the activation energy and pre-exponential for diffusion coefficient of Na + in NaCl are 173000 J/mol and 4.0x10-4 m 2 /s respectively. Calculate the mobility of Na+ ions at 600 o C. = RT Q exp D D kT eD n ion ion = e=1.602x10-19 C/atom R=8.314 J/molK k=1.38x10-23 J/atomK 0.5 point + 0.5 for unit 0.5 point + 0.5 for unit 1 point + 0.5 for unit 1 point + 0.5 for unit 1 point + 0.5 for unit 1 point + 0.5 for unit 1 point 1 oint...
View Full Document
- Fall '08