state properties

[Mary Grace Stevens 3G]

How is heat not a state property but enthalpy is a state property?

[dana hu 1B]

Enthalpy is a state function because it depends only on the state of the system and not on the path taken to reach its value.
Heat & work are the forms of energy in transit. They appear only when there occurs any change in the state of the system and the surroundings. They don't exist before or after the change of the state, therefore not state properties.

[Caelin Brenninkmeijer 1G]

Heat is not a state function because it is not an intrinsic property of a system whereas enthalpy is a state function because it only needs the initial and final states of the system and not the path taken.

[Annika Tamaki 1E]

State properties focus on the destination, instead of the path taken. So for enthalpy and other state properties, it doesn't matter what happens in between, only the final and initial values. However, heat is specifically measuring the path taken because amount of heat differs for different pathways. Hope this helps!

[SashaAnand2J]

Hi Mary!
While enthalpy does not change for a particular reaction, regardless of pathway, heat for a reaction may change depending on the pathway taken. This means heat is not a state function. It is pathway-dependent.

[Jarrett Sung 3B]

Enthalpy just depends on the initial and final states, while heat is what appears when there is a change in enthalpy or work. Heat depends on the path taken instead of the start and end points.

[Ashley Wagner 2A]

Heat is dependent on its pathway which makes it not a state function. In contrast, enthalpy is independent of its path, which makes it a state function. Furthermore, enthalpy, unlike heat, only relies on the initial and final value.

[Gicelle Rubin 1E]

Thank you for asking, I was also wondering the same thing!

[305614361]

Because heat represents the transfer of energy to or from a system as a result of temperature

[Sabrina Galvan 3J]

Enthalpy only depends on the final and initial states, meaning it is not dependent on the path it takes to get there. Heat is not calculated the same way.

[Randi Ruelas 1G]

Enthalpy is the amount of heat released or absorbed at a constant pressure. Heat is not a state function because it is only to transfer energy in or out of a system; it depends on pathways.

[Teti Omilana 1G]

Heat isn't a state function because it depends on pathways, and enthalpy depends on the initial and final states.

[Rachael Cohen 3G]

Enthalpy is a state function because it does not depend on the pathway of a reaction. Heat, on the other hand, is a property intrinsic to a certain species and its formation, so it is dependent on the pathway.

[Diana Aguilar 3H]

Like many others have stated, heat is not a state function because it depends on the pathway of the reaction, while enthalpy does not rely on the pathway, only the initial and final states of the reaction matter.