Enthalpy

$\Delta U=q+w$

Megan Cao 1I
Posts: 103
Joined: Sat Sep 07, 2019 12:18 am

Enthalpy

What does the term "state function" entail? All I've seem to understand from it is that it's only dependent of its current calculated state and that you can add it's values. Other than that, what does "state function" mean?

jisulee1C
Posts: 149
Joined: Thu Jul 25, 2019 12:17 am

Re: Enthalpy

A state function means that only the initial state and final state are needed to determine the value. I think Lavelle's example of how only the initial and final destinations matter when you hike a mountain and how the pathway you took is irrelevant explains conceptually what a state function is.

Gurmukhi Bevli 4G
Posts: 49
Joined: Wed Nov 14, 2018 12:20 am

Re: Enthalpy

The value of state functions are independent of pathways taken to reach their initial/final values. Since pathway becomes inconsequential, the quantity is only dependent on initial and final values.

Fiona Latifi 1A
Posts: 102
Joined: Sat Sep 14, 2019 12:16 am

Re: Enthalpy

Examples of state functions include density, internal energy, enthalpy, and entropy.

Posts: 116
Joined: Thu Jul 25, 2019 12:15 am

Re: Enthalpy

A state function relies on initial and final values, not the pathway taken.

Juana Abana 1G
Posts: 100
Joined: Wed Sep 18, 2019 12:15 am

Re: Enthalpy

The value of a state function is only dependent on the initial value and the final value.

Brandon Valafar
Posts: 112
Joined: Sat Aug 17, 2019 12:16 am
Been upvoted: 1 time

Re: Enthalpy

State functions are independent values regardless of the pathway to get to the final value. The quantity only matters based on the final and initial values, and not the pathway to get there.

Dan M -3E
Posts: 101
Joined: Wed Sep 18, 2019 12:19 am

Re: Enthalpy

Something being a state function means that the pathway by which the value arrived at its final value does not matter in the calculation of the value.

san_2F
Posts: 118
Joined: Sat Jul 20, 2019 12:15 am

Re: Enthalpy

A state function is a property that states that the path that something takes is irrelevant, the only thing that matters is the final result or final state. d

Brandon Valafar
Posts: 112
Joined: Sat Aug 17, 2019 12:16 am
Been upvoted: 1 time

Re: Enthalpy

A state function doesn't rely on the pathway taken, it only relies on the initial and final values.

Chris Charton 1B
Posts: 69
Joined: Mon Jun 17, 2019 7:23 am

Re: Enthalpy

State functions only depend on initial and final values, thus intermediate steps are irrelevant when calculating enthalpy or entropy.

Posts: 81
Joined: Fri Sep 28, 2018 12:28 am

Re: Enthalpy

Fiona Latifi 1A wrote:Examples of state functions include density, internal energy, enthalpy, and entropy.

Could you also give examples of what would not be a state function?

Chris Charton 1B
Posts: 69
Joined: Mon Jun 17, 2019 7:23 am

Re: Enthalpy

Fiona Latifi 1A wrote:Examples of state functions include density, internal energy, enthalpy, and entropy.

Could you also give examples of what would not be a state function?

Work is an example of a non-state (path) function