in which case would the kinetic energy of particles be increasing?
1. Metal is melted at 1300°C.
2. Metal is heated from room temperature at 200°C.
3. Metal is at room temperature 37°C.
4. Metal is cooled at 1300°C.
The correct answer is 2. Metal is heated from room temperature at 200°C.
When a substance is heated, the kinetic energy of its particles increases. Therefore, as the metal is heated from room temperature, the kinetic energy of its particles will be increasing.