According to this formula: K= A*(e^(-Ea/RT) when we have K =1.35X10^2 & T= 25+273= 298K &R=0.0821 Ea= 85.6 KJ/mol So by subsitution we can get A: 1.35x10^2 = A*(e^(-85.6/0.0821*298)) 1.35x10^2 = A * 0.03 A= 4333 by substitution with the new value of T(75+273) = 348K & A to get the new K ∴K= 4333*(e^(-85.6/0.0821*348) = 2.16 x10^2