HW05-Phys416-2010fall

# HW05-Phys416-2010fall - Homework 5 Phys 416 Due Friday Oct...

This preview shows pages 1–2. Sign up to view the full content.

Homework 5 Phys 416 Due : Friday, Oct. 1, 2010, at 3:00 pm in Room 144. Note : On your HW write: “ PHYS 416 HW, Grader Marius Radu Do problems 5.6, 5.8, 5.10, 6.1, 6.2 in the text. Additional problems: A. Heat capacity of a penny (a) Please find the specific heat capacity of a penny using general equations obtained in Debye approximation for solids at high temperatures (Lecture 7). Assume that a penny is solid copper (true for pennies made before 1857), and use copper atomic weight of 63.55 g/mol. Compare that theoretical prediction of Gibbs model with the measured heat capacity of copper at various temperatures (Rev. Sci. Instrum. 58 (1987) 639): T(K) – C (J/g . K) 20 K – 0.007 100 K – 0.252 280 K – 0.381 300 K – 0.385 (~room temperature) 320 K – 0.388 (b) Since 1982 penny is 97.5 % zinc (core) coated with 2.5% copper (you can ignore copper). Would the heat capacity (in J/gK) of a zinc penny be much different from that of a copper penny? (atomic weight of zinc is 65.39

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.

{[ snackBarMessage ]}

### Page1 / 2

HW05-Phys416-2010fall - Homework 5 Phys 416 Due Friday Oct...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online