The equlibrium constant K, for the reaction N2+3H2⇌2NH3 is 1.64×104atm at 400∘C . What will be the equilibrium constant at 500∘C, if heat of reaction in this temperature range is - 105185.8 Joules.
0.144 × 10-4atm
Kp1=1.64×10−4atm,Kp2=?
T1=400+273=673K
T2=500+273=773K
△H=−105185.8 Joules
R=8.314 J/K/mole
Applying equation
LogKp2=log1.64×10−4
105185.82.303×8.314(773−673773×673)
or Kp2=0.144×10−4atm