phase change

[Sophia Dinh 1D]

how can you tell if there has been a phase change?

[Parker Smith]

Usually the problem will tell you when a phase change occurs, or if on a phase diagram the temperature remains constant but enthalpy increases, the energy in crease was used for the phase change of the compound.

[Sanjana Borle 2K]

Like the diagram in class, you can tell that there is a phase change when the heat or enthalpy is increasing, but the temperature is not increasing, or delta T is zero.

[KBELTRAMI_1E]

Like the diagram in class, you can tell that there is a phase change when the heat or enthalpy is increasing, but the temperature is not increasing, or delta T is zero.

Can the enthalpy increase AND the temperature remains the same while there still not being a phase change? Like I'm imagining the enthalpy of water at a positive value but without becoming a gas? Is that possible?

[Ivan Tadeja 1G]

Like the diagram in class, you can tell that there is a phase change when the heat or enthalpy is increasing, but the temperature is not increasing, or delta T is zero.

Can the enthalpy increase AND the temperature remains the same while there still not being a phase change? Like I'm imagining the enthalpy of water at a positive value but without becoming a gas? Is that possible?

I was wondering the same thing. Would any change in either of these, no matter to what degree, result in a phase change? Or is there an explicit threshold for each phase with regards to the reaction?

[Julia Holsinger_1A]

Like the diagram in class, you can tell that there is a phase change when the heat or enthalpy is increasing, but the temperature is not increasing, or delta T is zero.

Can the enthalpy increase AND the temperature remains the same while there still not being a phase change? Like I'm imagining the enthalpy of water at a positive value but without becoming a gas? Is that possible?

I was wondering the same thing. Would any change in either of these, no matter to what degree, result in a phase change? Or is there an explicit threshold for each phase with regards to the reaction?

I believe because enthalpy is a state function there are explicit thresholds for each phase which is why, when plotted, it is a step diagram. That is how I understood it, there could be a different explanation

[Ivan Tadeja 1G]

Can the enthalpy increase AND the temperature remains the same while there still not being a phase change? Like I'm imagining the enthalpy of water at a positive value but without becoming a gas? Is that possible?

I was wondering the same thing. Would any change in either of these, no matter to what degree, result in a phase change? Or is there an explicit threshold for each phase with regards to the reaction?

I believe because enthalpy is a state function there are explicit thresholds for each phase which is why, when plotted, it is a step diagram. That is how I understood it, there could be a different explanation

That is how I initially believed it to be. Are all diagrams for phase changes step diagrams?