Standard states

[Saaga Bergstrom 2E]

Is there/will there be a table of standard states of compounds or will we have to memorize them? Also, if an equation has compounds that are not in their standard states, is there a way to convert them to standard state in the equation or is there a different value for those compounds in those states?

[Reuben 1H]

I believe all we have to know for standard states is that the most stable form of carbon is solid graphite and for diatomic elements, their diatomic state is their standard state. I believe in our last lecture we were also told we can convert a substance to its standard state by adding the energy necessary to, let's say cool water vapor to a liquid for example, but I could be wrong.

[206030797]

I believe that compounds in questions will be given in their standard state most of the time, or else explicitly stated otherwise. I agree that probably the only ones we have to remember is graphite and the diatomic bit but other then that we should be able to use the table provided in the textbook to convert if necessary and find the necessary values. Hopefully it's not more complicated than that.

[705995679]

I don't think there is a way to convert states back into their standard form, I'm sure it will be provided to us because the professor provides basic tables for the midterms.

[Nayuki_2J]

Hi, I think you do need to have your standard states memorized, but as far as conversion goes you'll probably just need to know that there is a conversion (Ex. H2O (s) --> H2O (l)) and the enthalpy value of that conversion will most likely be given.