A piece of ice initially at a temperature below freezing is heated until finally it is entirely vaporized and?

Question

A piece of ice initially at a temperature below freezing is heated until finally it is entirely vaporized and reaches a temperature above the boiling point of liquid water. This change takes place at atmospheric pressure. The number of thermodynamic processes required is _____

I looked up thermodynamic processes and I cant quite figure out what they are?!?! What is each thermodynamic process that takes place in this problem?

Answer 1

5 !
1.Heating the solid to 0 degrees
2. melting the solid
3. heating the liquid to 100 degrees
4. Boiling the liquid (liquid to gas)
5. Heating the gas.

Answer 2

The answer the other person provided are actually phase changes...

1. You need to heat the ice to the point of freezing (0C or 32F). This is an isobaric process. The pressure remains constant but the temperature changes.

2. At the point where the ice is at 0 degrees, it begins to melt as you add heat. While the ice melts it still remains at the freezing temperature, 0C. How much heat/energy required is called the latent heat of fusion. As long as there is a water/ice mixture, you will maintain temperature. This is an isothermal thermo dynamics process.

Once all the ice has been melted, you have 100% water.

3. Then the temperature will begin to rise, until it reaches the boiling temperature (100C or 212F). This is an isobaric process.

4. Another phase change will begin to take place at the boiling point, from water to steam (the gas phase). The energy/heat required to transform all the water to steam is called the latent heat of vaporization. Again, the temperature will remain at the boiling temperature until all the water has been transformed to steam. This is an isothermal thermo dynamics process. Unless it is in a closed container, then it would be isochoric, where the volume stays constant. Pressure would increase due to the energy injected into the system.


5. Add more heat and you begin to increase the temperature of the steam (assuming it is contained somehow, or it will boil away into the atmosphere where is will eventually condense.) This is an isobaric process.

So you really only have 2 processes: isobaric process and isothermal, maybe 3, depending on your situation.

Thermodynamics can be confusing when looked at as a whole, but examining one process at a time will make it much easier.

Please, inform me if I got my terminology mixed!

Answer 3

you probably did not aspect out about the room temperature. no matter if it truly is 0, if no warmth power is coming there by radiation, chance of melting is really uncommon. Boiling aspect relies upon upon the encompassing rigidity ( see theory of rigidity coocker), Meltimg aspect too, yet no longer very a lot.

Answer 4

i initially wrote 2, but i believe the gentleman above me has it correct =)