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Standard Enthalpy of a Reaction

Posted: Fri Jan 08, 2016 10:00 pm
by Steph S 2F
Will there be a situation in which we are told to find the standard enthalpy of a reaction, but one of the products is not in its standard state?
How are we supposed to take the phase change of this product into account?

Re: Standard Enthalpy of a Reaction

Posted: Fri Jan 08, 2016 10:41 pm
by Chem_Mod
The standard enthalpy of anything that is not in the standard reference state would be given in the back of the book with a nonzero value. For example, Carbon(graphite) and N2(gas) are standard states and have enthalpy zero. But Carbon(diamond) and N2(liquid) would not be zero.