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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: maccha on February 07, 2010, 01:05:37 AM

Title: Enthalpy of formation
Post by: maccha on February 07, 2010, 01:05:37 AM

So the equation for change in enthalpy is (delta) H = (delta)U + (delta)PV. My textbook says that for enthalpies of formation, elements in their standard state are assigned 0 for their change in enthalpy, but that this is simply a reference point. How can they just assign this if there is an equation for the process?

Title: Re: Enthalpy of formation
Post by: maccha on February 07, 2010, 01:09:57 AM

Nevermind I understand and that question didn't even really make sense, sorry.