Open main menu

Wikibooks β

A-level Physics (Advancing Physics)/Heat and Energy/Worked Solutions

< A-level Physics (Advancing Physics)‎ | Heat and Energy

1. Carbon dioxide sublimes at 195°K. Roughly what energy per. particle does this correspond to?

2. A certain chemical reaction requires particles with mass of the order 10−26 to move, on average, at 10ms−1. Roughly what temperature does this correspond to?

°K

3. The boiling point of water is 100 °C. Roughly what energy per. particle does this correspond to?

100 °C = 373°K

4. Thermionic emission from copper requires around 5eV of energy per. particle. How hot will the wire be at this energy level?

5eV = 5 x 1.6 x 10−19 = 8 x 10−19 J particle−1

°K