Question

If I had a quantity of this substance at a pressure of 0.75 atm and a temperature of -1000 C, what phase change(s) would occur if I increased the temperature to 6000 C? At what temperature(s) would they occur?

Answer 1

When increasing the temperature of a substance, phase changes occur as it transitions from one physical state to another. For carbon dioxide, these phase changes include sublimation, condensation, evaporation, and deposition. The specific temperatures at which they occur can be found in the carbon dioxide phase diagram.

Step-by-step explanation:

When a substance undergoes a phase change, it transitions from one physical state to another, such as from solid to liquid or from liquid to gas. In this case, if you increase the temperature of the substance from -1000 ℃ to 6000 ℃ at a pressure of 0.75 atm, the phase changes that would occur depend on the substance in question.

If the substance is carbon dioxide, it would undergo the following phase changes:

1. From solid to gas (sublimation) at a certain temperature
2. From gas to liquid (condensation) at a certain temperature
3. From liquid to gas (evaporation) at a certain temperature
4. From gas to solid (deposition) at a certain temperature

The specific temperatures at which these phase changes occur can be determined by referring to the phase diagram of carbon dioxide. So without that information, it is not possible to provide the exact temperatures for these phase changes.