Free Energy
Moderators: Chem_Mod, Chem_Admin
-
- Posts: 113
- Joined: Wed Sep 30, 2020 10:08 pm
Free Energy
Can someone explain what a state function is again and why free energy is a state function?
-
- Posts: 110
- Joined: Wed Sep 30, 2020 9:49 pm
- Been upvoted: 3 times
Re: Free Energy
A state function only depends on start and ending states, not the path taken. Free energy is a state function because it doesn't matter how the free energy gets from one value to another, it just matters where it starts and ends up. This is different from "path" functions like heat and work. Hope this helps!
-
- Posts: 142
- Joined: Wed Sep 30, 2020 10:03 pm
Re: Free Energy
A state function does not depend on the path taken to the final value/destination. Typically with state functions, we only care about the final-initial values since it is not dependent on the pathway taken.
Re: Free Energy
State functions only depend on final and initial states and do not care about the pathway that it took to get there. Free energy is a state function because it satisfies that requirement.
-
- Posts: 53
- Joined: Wed Nov 18, 2020 12:32 am
Re: Free Energy
A state function is where the value doesn't depend on the path taken to get there, but only the final and initial values. Free energy is a state function because we only need the final and initial values to find the change and determine whether the reaction is spontaneous.
-
- Posts: 131
- Joined: Thu Jul 11, 2019 12:17 am
Re: Free Energy
Melissa Solis 1H wrote:Can someone explain what a state function is again and why free energy is a state function?
For a state function, the path you took to get the your values does not matter so you can only take into consideration your final and initial values.
-
- Posts: 55
- Joined: Wed Nov 18, 2020 12:27 am
-
- Posts: 86
- Joined: Wed Sep 30, 2020 10:08 pm
Re: Free Energy
State functions only really focus on the initial and final states, or values. They aren't concerned with the path to get there. Free energy is a state function because we only care about and needs the initial and final states to calculate change.
-
- Posts: 106
- Joined: Wed Sep 30, 2020 9:49 pm
Re: Free Energy
The state function does not depend on the path taken to the final value or state, only the starting and ending states.
-
- Posts: 100
- Joined: Wed Sep 30, 2020 9:31 pm
Re: Free Energy
Hey a state function only considers the initial and final states of a reaction or value, so the "path" taken to get to a certain point doesn't matter only if the initial and final states are the same. With this, free energy is a state function in that the change in free energy for a reaction will not change no matter how we manipulate the work or path to get there. This shows us how certain reactions can be spontaneous or not.
-
- Posts: 100
- Joined: Wed Sep 30, 2020 10:01 pm
Re: Free Energy
Similar to enthalpy and entropy, free energy is a state function as it only requires the final and initial values.
-
- Posts: 62
- Joined: Tue Nov 17, 2020 12:20 am
Re: Free Energy
A state function is something that does not depend on the "journey" taken to go from initial to final state. Therefore, a state function is simply the difference between initial and final state. Some examples of state functions are ∆S, ∆H, and ∆G. An example of something that is not a state function is work, because work depends on the path (work is proportional to distance an object is moved, for example).
-
- Posts: 100
- Joined: Wed Sep 30, 2020 9:52 pm
Re: Free Energy
State functions are primarily focused on start and end states. The "path" taken is irrelavent.
-
- Posts: 116
- Joined: Wed Sep 30, 2020 9:39 pm
Re: Free Energy
State functions only depend on the initial and final states and the path that was taken does not matter. Free energy is a state function since it is defined by other state functions H and S.
-
- Posts: 106
- Joined: Wed Sep 30, 2020 9:50 pm
Re: Free Energy
State functions are only dependent on their final and initial states, so the pathway through those states isn't important.
-
- Posts: 121
- Joined: Wed Sep 30, 2020 9:35 pm
Re: Free Energy
A state function is one where the path of the change doesn't affect anything, just the start and the end.
-
- Posts: 103
- Joined: Wed Sep 30, 2020 9:41 pm
Re: Free Energy
State functions do not depend on the path taken to get to them. State functions can be added and subtracted. Delta G is a state function because it is defined by state functions.
-
- Posts: 104
- Joined: Wed Sep 30, 2020 9:56 pm
Re: Free Energy
A state function only cares about the final and initial states and doesn't take into account the path taken. Free energy is a state function because only the final and initial values of free energy are what matters.
-
- Posts: 96
- Joined: Wed Sep 30, 2020 9:36 pm
Re: Free Energy
State functions only depend on the beginning (initial state) and the last (final) state, regardless of what happens in between.
Re: Free Energy
Non-state functions depend on the path taken by reactants in various forms. For example, the total work exerted by a system relies on all of the work done at every point in the process. This result is not net but cumulative.
-
- Posts: 99
- Joined: Sat Jul 20, 2019 12:15 am
Re: Free Energy
A state function is a function that does not depend on the path that is taken to get the final value. Free energy is a state function because only the initial and final values matter - the path taken does not, however.
-
- Posts: 101
- Joined: Wed Sep 30, 2020 9:46 pm
Re: Free Energy
A state function is a function that doesn't depend on the path taken to get to a final answer, as long as this function begins and ends with the same value. Free energy is a state function as the path taken to to get to the final value does not really matter.
Re: Free Energy
a state function is one in which the pathway of the energy is not important, rather where it begins and ends
-
- Posts: 101
- Joined: Wed Sep 30, 2020 9:42 pm
-
- Posts: 125
- Joined: Wed Sep 30, 2020 9:32 pm
Re: Free Energy
A state function is when the path taken does not matter; in other words, only the final and initial states matter. Free energy is a state function because we only need the values of the free energies of the products and reactants to determine if the reaction is spontaneous (whether the difference between the products and reactants is negative or not).
-
- Posts: 107
- Joined: Fri Aug 09, 2019 12:16 am
Re: Free Energy
State functions is when u can simply solve a problem by observing the final state minus the initial state.
-
- Posts: 124
- Joined: Wed Sep 30, 2020 9:35 pm
- Been upvoted: 6 times
Re: Free Energy
Like other students stated above, state functions are independent of the path taken which means that to get the value of the change of the state function you only need to subject the initial state from the final state. Free energy is a state function because it does not matter what path it took to end up in its final state (we can use the free energy values of the products and reactants to see if a reaction is spontaneous).
-
- Posts: 101
- Joined: Wed Nov 13, 2019 12:19 am
Re: Free Energy
For a state function, the path taken does not matter. You look solely at the final and initial values.
-
- Posts: 80
- Joined: Wed Sep 30, 2020 9:52 pm
Re: Free Energy
In a sense, it's like looking at exothermal and endothermal graphs where we only focus on the initial and final states.
-
- Posts: 108
- Joined: Wed Sep 30, 2020 9:40 pm
Re: Free Energy
State functions are path independent meaning only starting and ending values are important and this is the case with free energy.
-
- Posts: 113
- Joined: Wed Sep 30, 2020 9:55 pm
Re: Free Energy
A state function tells us that when calculating the only values of importance are the initial and final values. The example commonly used to explain this concept was describing the pathway taken-up a hill. In summary, state functions only take into consideration the starting and ending points, and not the pathway, whether direct or indirect, that it took to get there.
-
- Posts: 60
- Joined: Wed Nov 18, 2020 12:20 am
Re: Free Energy
A state function is something that does not depend on the path taken, and only depends on the final and initial states! Free energy is a state function because no matter what path it takes, it will always be the same value, as it only focuses on final vs initial states. When something is a state function, it also means it is additive, which is why you can find the delta G of a reaction by calculating the standard delta G's of the products - standard delta G's of the reactants.
-
- Posts: 103
- Joined: Wed Sep 30, 2020 10:09 pm
Re: Free Energy
State functions are independent of the path taken, so their values are only dependent on the starting and ending values.
-
- Posts: 112
- Joined: Thu Oct 08, 2020 12:16 am
Re: Free Energy
A state function only depends on the final and initial values, it doesn't care about the "path" taken to get there. Free energy is a state function because it follows these restrictions.
-
- Posts: 116
- Joined: Wed Sep 30, 2020 9:39 pm
Re: Free Energy
State functions are not affected by the path taken and only depend on the initial and final states.
-
- Posts: 104
- Joined: Wed Sep 30, 2020 9:42 pm
Re: Free Energy
State function does not depend on the path taken. Meaning that the only thing that matters is the final and initial state of the property. That's why when you are given the standard values of Gibb's free energy, you are able to do products - reactants.
-
- Posts: 136
- Joined: Wed Sep 30, 2020 9:51 pm
Re: Free Energy
State function only cares about the start and the end levels, not how they got there. Temperature, for example, is a state function, but work is not as more work may be done than just getting to start and end.
-
- Posts: 103
- Joined: Fri Aug 30, 2019 12:18 am
-
- Posts: 108
- Joined: Wed Sep 30, 2020 9:43 pm
Re: Free Energy
I believe state functions depend on only final and initial states so free enrgy would match that definition. Whereas other functions like work and heat do depend on the process it took to get to the final state.
-
- Posts: 100
- Joined: Wed Sep 30, 2020 9:53 pm
Re: Free Energy
State functions depend on both the initial and the final states. It is applicable to Gibbs free energy, enthalpy and entropy.
-
- Posts: 103
- Joined: Wed Sep 30, 2020 9:59 pm
Re: Free Energy
Hi, state functions are not dependent on the path taken to achieve the final state (meaning only the initial and final state are important), and free energy is an example.
-
- Posts: 69
- Joined: Wed Sep 30, 2020 9:44 pm
Re: Free Energy
State functions like Gibbs Free Energy (G) depend only on the initial and final values, and not on the pathway of the reaction. Because values like activation energy or free energy of intermediates (among others) do not affect the change in Gibbs Free Energy, we can assume that the Gibbs Free Energy of an overall reaction is a state function.
-
- Posts: 104
- Joined: Wed Sep 30, 2020 10:05 pm
Re: Free Energy
State functions denote the path taken is irrelevant and only the final and initial states should be taken into account.
-
- Posts: 51
- Joined: Wed Feb 20, 2019 12:18 am
Re: Free Energy
State functions are just dependent on the initial and final states and not on the multiple paths it can take to get there.
-
- Posts: 51
- Joined: Mon Jan 03, 2022 8:58 pm
Re: Free Energy
A state function is a process that ultimately only "cares" about the starting and ending points of it. Free energy does not require the entire process and pathway to be calculated, all that is relevant is the initial and final states.
-
- Posts: 103
- Joined: Fri Sep 24, 2021 5:29 am
- Been upvoted: 2 times
Re: Free Energy
A state function is a characteristic that means that it doesn’t matter which path is taken, the final and initial values will always been the same. Gibbs free energy is a state function because it is defined by other state functions, such as Delta H and Delta S.
-
- Posts: 50
- Joined: Wed Nov 11, 2020 12:18 am
Re: Free Energy
A state function is when the path taken does not effect the final volumes. Examples are temperature and volume.
Return to “Thermodynamic Systems (Open, Closed, Isolated)”
Who is online
Users browsing this forum: No registered users and 4 guests