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

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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