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Heres the question:

[PLAIN]http://img194.imageshack.us/img194/9042/vanthoff.png [Broken]

and heres the Van't Hoff equation (the form I like to use):

[PLAIN]http://img703.imageshack.us/img703/1577/vtequation.png [Broken]

I'm a bit confused about whats going on here. I see the formula includes ∆H

[PLAIN]http://img194.imageshack.us/img194/9042/vanthoff.png [Broken]

and heres the Van't Hoff equation (the form I like to use):

[PLAIN]http://img703.imageshack.us/img703/1577/vtequation.png [Broken]

I'm a bit confused about whats going on here. I see the formula includes ∆H

^{o}, meaning the enthalpy change for 1 mole of reactant at 298K. Does that mean to use this formula T1 always has to be 298K? In other words to get the ∆H^{o}for the reaction would I just plug 298K into T1 and 4.25 x 10^{-7}into K_{T1}then plug any other pair of values from that table into T2 and K_{T2}?
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