state functions?

Moderators: Chem_Mod, Chem_Admin

davidryan3f
Posts: 63
Joined: Fri Sep 28, 2018 12:23 am

state functions?

Postby davidryan3f » Fri Mar 15, 2019 7:51 pm

Ould someone explain what exactly a state function is?

Alana Sur 3B
Posts: 61
Joined: Fri Sep 28, 2018 12:25 am

Re: state functions?

Postby Alana Sur 3B » Fri Mar 15, 2019 8:20 pm

state functions do not depend on the path to obtain that state - only the final and initial values matter. Energy, pressure, temperature are examples of state functions

sharonvivianv
Posts: 63
Joined: Fri Apr 06, 2018 11:05 am

Re: state functions?

Postby sharonvivianv » Fri Mar 15, 2019 8:36 pm

Work would not be considered a stat function because the we need the information in between. Work is a path function.

Jared Khoo 1G
Posts: 70
Joined: Wed Sep 18, 2019 12:16 am

Re: state functions?

Postby Jared Khoo 1G » Sat Jan 25, 2020 2:57 pm

State functions are functions where only the final state and the initial state matter when doing calculations and all intermediate states are effectively immaterial. For example, when calculating energy for a gas at two different temperatures, the fact that it is at any other value besides the start and the end is not important, only the initial and final temperature are important.

lilymayek_1E
Posts: 70
Joined: Sat Aug 17, 2019 12:16 am

Re: state functions?

Postby lilymayek_1E » Sat Jan 25, 2020 3:06 pm

state functions are only determined by final & initial values, much like how a state property is determined by its current state & not the path taken to obtain that state.

DHavo_1E
Posts: 73
Joined: Sat Aug 17, 2019 12:17 am

Re: state functions?

Postby DHavo_1E » Sat Jan 25, 2020 10:12 pm

Hi,

I would like to add Dr. Lavelle's example with the diagram of a mountain, about how altitude was a state function because it was a set amount and only depended on initial and final values while two hikers (A and B) had different values depending on the pathway they took (similar to work).

faithkim1L
Posts: 70
Joined: Fri Aug 09, 2019 12:17 am

Re: state functions?

Postby faithkim1L » Sat Jan 25, 2020 11:51 pm

State functions don't depend on the path taken to get to its current state. The formula final - initial works for state functions, meaning that the stuff between final and initial doesn't matter. Enthalpy is a state function.


Return to “Heat Capacities, Calorimeters & Calorimetry Calculations”

Who is online

Users browsing this forum: No registered users and 0 guests