Answers: 1
.
of the reaction, we use Van't Hoff equation, which is:![\ln(\frac{K_2}{K_1})=\frac{\Delta H^o}{R}[\frac{1}{T_1}-\frac{1}{T_2}]](/tpl/images/0384/3665/367d7.png)
= vapor pressure at temperature 
= vapor pressure at temperature 
= Enthalpy change of the reaction= ?
![]\Delta H^o= 90.3 kJ/mol](/tpl/images/0384/3665/dacfa.png)
![\ln(\frac{K_2}{1.95\times 10^{-31}})=\frac{180,600J/mol}{8.314 J/mol K}[\frac{1}{298.15 K}-\frac{1}{2273.15 K}]](/tpl/images/0384/3665/8fbe3.png)
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