An element's standard state

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Harmony Becerra
Posts: 32
Joined: Sun Jan 21, 2018 3:00 am

An element's standard state

Postby Harmony Becerra » Fri Jan 25, 2019 7:13 pm

When talking about standard reaction enthalpies, how are we supposed to know what an element's standard state is? Like, what if we did not know that the standard state of H20 is liquid? Is that something we'd be given on an exam?

Samantha Jimenez 4k
Posts: 29
Joined: Fri Sep 28, 2018 12:21 am

Re: An element's standard state

Postby Samantha Jimenez 4k » Fri Jan 25, 2019 7:48 pm

If I'm right, I believe most reactions are given in their standard state

Katelyn Pham 4E
Posts: 30
Joined: Fri Sep 28, 2018 12:21 am

Re: An element's standard state

Postby Katelyn Pham 4E » Fri Jan 25, 2019 9:05 pm

You know that something is in its standard state if it satisfies certain conditions:

1. The temperature should be 25 degrees Celsius (usually).

2. All liquids and solids are pure.

3. The concentration of all solutions is 1 M at 1 atm.

4. All gases are at 1 atm.

5. Elements are in their most stable phase.


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