Respuesta :
Melting, evaporation and sublimation require an increase in energy.
To determine the changes of state that require an increase in energy, we need to know about changes of state.
What are the changes of state of a substance?
Melting, evaporation and sublimation are the changes of state of a substance.
How do melting, evaporation and sublimation require an increase in energy?
- In melting process, substance goes from solid to liquid state. In evaporation state, it goes from liquid to vapour state and in sublimation, it goes from solid to vapour state.
- In each of the above case, the bonds between molecules of the substance become weak due to getting of heat energy. And the heat energy is appeared as kinetic energy of the molecules.
- So the molecules vibrate rapidly which leads to the change of state.
Thus, we can conclude that melting, evaporation and sublimation require an increase in energy.
Learn more about changes of state here:
https://brainly.com/question/18372554
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