For the chemical equilibrium , CaCO_3 (s) hArr CaO (s) + CO_(2) (g) , Delta_(r) H^(@) can be determined from which of the following plots ?

For the chemical equilibrium , CaCO_3 (s) hArr CaO (s) + CO_(2) (g) ,

1.	For the chemical equilibrium , CaCO_3 (s) hArr CaO (s) + CO_(2) (g) , Delta_(r) H^(@) can be determined from which of the following plots ?
Answer» Solution :For the given reaction, ` K_(p) = p_(CO_(2)) or p_(CO_(2))//p^(@)` `(p^(@) " = Reference PRESSURE of 1 atm )` According to van't Hoff equation , ` (d 1n K_(p))/(DT)= (Delta H^(@))/(RT)+2` ` :.1n K_(p) = -(Delta H)^(@)/(RT)+ I` ` (2*303 log p_(CO_(2)))/P^(@) = -(DeltaH^(@))/(RT) + I` HENCE , plot of log `p_(CO_(2))//p^(@)` versus 1/Twill be a stright line with a negative SLOPE .