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