CHEM 1332 1st Edition Lecture 11 Outline of Last Lecture - Bonds- Rates- Equilibrium ratesOutline of Current Lecture - Activation energy- Constant equilibrium- Constant pressure equilibrium Current Lecture- The peak of the curve represents the peak of the transition state -keq=RightiesLefties∨kforwardkreverse- At equilibrium there is more righties therefore keq greater than 1- Big EA (Activation energy) on the right is a slower rate- Little EA on the left is a faster rate- The rate is proportional with one over the activation energy - The reverse equilibrium is less than the forward equilibrium - The righties are more stable and are away from the transition stateThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- The kr is less than the kf- The kfkr=keq >1- Example equation A +2 B ⇌ C+3 B- The keq equation is [C]eq [ D]eq3[A]eq[B]eq2- The mechanism of this equation has two steps - The first step is A +B ⇌ E+2 D at equilibrium k 1=[E]eq[ D]eq3[A]eq[B]eq- The second step is E+B ⇌C+ D at equilibrium k 2=[C]eq[D]eq[E]eq[B]eq- To get the overall equation we add the steps to get A +2 B ⇌ C+3 B and to get keq=k1xk2 and we get [C]eq [ D]eq3[A]eq[B]eq2- Keq is the function of products equilibrium over reactants equilibrium - Kc is for concentration which the product of righties equilibrium to the power of the coefficient over the product of lefties equilibrium to the power of the coefficient - Kp is for pressure multiplied by righties equilibrium to the power of the coefficient over the pressure multiplied lefties equilibrium to the power of the coefficient -kp=kc (RT )∆ n-∆ n means the change of moles of gas between the products and reactantsKey TermsKp(constant pressure)- equilibrium constant based on
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