Question

Predict and calculate the effect of temperature change on an equilibrium system. CHA reacts with CCl4 to form CH2Cl2. The equilibrium constant, Kp, for this reaction is 9.52x102 at 350 K. CH,(g) +CC1,0)=2CH,C1) The standard enthalpy change for this reaction (AH”) is 18.8 kJ/mol. (a) Predict the effect on the production of CH, Cl, when the temperature of the equilibrium system is increased. production is favored production is disfavored (6) Use the van't Hoff equation to estimate the equilibrium constant for this reaction at 434 K. K, at 434 K =

Answer 1

According to Arrhenices equation In ( )OH G + te is the rate constant at a temperature Is k is the rate constant at a temperature T. R = 8.314 5. malty AH is the enthalpy of the reaction. Ti I are in Kelvin + . If we plot a graph of (Ink) us we get a straight line with a slope of Ea k = AR RT A Inka InA - E slope = ta Intercept = Ina. A is called Arrhenius pre-exponential factor

at high Enothermic reactions / Hy 2o) are favoured temperatures OH = 18.8 87/mnd to (so it is favoured at high So the reaction is Product favoured temperatures) Produst is favoured Kp = 9.52X 10² at T = 350k | K₂ = ? at T = 434* 188x103 g. med? n in 1 kg as2x102) 3 sok 4.52x 8:3145 morti? 1.250458(6078 in semanas) = 1.25045866078 K. 9.52 810 2 1 K 1.25045869678 . 3.491944 9.52863 = K = 9.52x16 x 3.491944 k, = 0.33243309