Question

HELP ASAP PLEASE!!


1. What happens to particles when a substance gains energy and changes state?
2. What happens to the energy that is lost when water freezes?
3. How does the movement of particles in a stick of butter differ from the movement of particles in a dish of melted butter?
4. As water is cooled, at what temperature do its particles become fixed in place?
5. How do evaporation and boiling differ?

Answer 1

1. The particles keeps on moving (move faster) when a substances gains energy and changes state.

2. When water freezes it gives up some of the water's energy. This energy that is given up is the latent heat of freezing. When the water was freezing latent heat of freezing energy was being released. Heat energy was actually being released

3. In a stick of butter, the particles are locked together and are compact. In melted butter, the particles can slide past each other and are less compact.

4. 0 degrees Celsius.

5. Evaporation only happens at the surface while boiling happens all throughout.

Answer 2

1. Its particles move farther apart.

2. It is transferred to another substance (i.e. the air)

3. stick of butter- particles in a line and cannot move

melted butter- particles can slide by each other but are still close together

4. 0 degrees Celsius (32 degrees Fahrenheit)

5. evaporation- the surface of the liquid is heated slowly and eventually becomes a gas

boiling- the entire liquid is heated and the entire liquid becomes a gas