Question

please help with #20 and 21. showing all work

20. (6pts) Consider the exothermic (left to right) reaction: 2X60) - 3Y9) +Zg) State in which direction the equilibrium will shift, if either, when each of the following happens. Explain why: a. increase in volume b. decrease in T c. increase in [X ] 21. (12prs) Sketch the curve for Energy versus Reaction Progress, on the axes provided below. On the same graph, sketch the curve for Energy versus Reaction Progress for the catalyzed reaction. On your graph, label clearly each letter, a, b, c, d, representing the aspects of the reaction noted below. Then answer the question. a. energy of products = 620k) b. activation energy = 750k) 800- c.catalyzed activation energy = 715kJ d. energy of reactants - 440kJ Energy (kJ) Food Reaction progress-> Is this reaction exothermic or endothermic? Explain how you know.

Answer 1

Ans. liven Criven Exothermic Exothermic reaction. (a) Increase in volume - If we incre ng 3% +243) This can be explained according to Le chatilier pains tume - If we increase the volume, t means there is decrease in pressure, means decrease in the number of molecules, per unit volume, so equilibrium will shift in a direction in which there is increase in number of molecules per unit volume so equilibrium shift in the backward reaction. Thalas NO (6) Decrease in Temperature ne we decrease the temperature, then equilibrium will shift in a direction in which there is increase in temperature means it favowe exothermic geaction se equilibrium shift in the forward direction as forward Heaction is exothermic ces increase in [x7g - Increase in concentration a reactant causes the equilibrium to shift a direction in which there is a decrease concentraction so it favour forward reaction. po nilibrium shift towards eight. equilibrium to

Ang Energy veisus Reaction Progress Uncatalysed Product for catalyzed process Activation energy Reach Short and W ellvotion energy for unca dalysed process Progress of reaction. At reaction - Energy of Panduct – Energy of Reactant = 620 kg - 440 kj - 180 ky = +ve So means there is absorption of energy as energy of product is greater than reactant, So reaction is endothermic. Representation of graph in form a, b, c, d as 8077 700 1 ca) Aprono di fo