Question
following pictures represent the initial state state for the reaction of A molecules (red) with B and the Conceptaal Problems 541 of solld BaCO, solid BaO, and gaseous CO, obtained as a result of the rium blue) to give AB molecules: equilib- atoms 13.33 The following picture represents an equilibeium mixture endothermic decomposition of BaCO, Initial state Equilibrium state Write a balanced chemical equation for the reaction. (a) (a) Draw a picture that represents tbe equilibrium mixture after (b) Draw a picture that represents the equilibrium mixture at a 13.34 The following picture represents the composition of the equilb b) if the volume of the equilibrium mixture is decreased. will addition of four more CO, molecules. the number of AB molecules increase, , or remain higher temperature. Consider the reaction AAB, The vessel on the right contains an equilibrium mixture of A molecules (red spheres m mixture for the endothermic reaction A2 A at 500 K molecules (blue spheres), and AB molecules. If the stopcock vll the reaction go in the forward or reverse direction? Explain. and the contents of the two vessels are allowed to mix, Draw a picture that represents the equilibrium mixture after each of the following changes ) Adding a catalyst ures represent the composition of the equilb BAB at 300 K and at 1331 b) Increasing the volume rium mixture for the reaction A 400 K: ) Decreasing the temperature 13.35 The following picture represents the equilibrium state for the reaction 2 ABA B T=300 K T 400 K onstant is larger Is the reaction exothermic or endothermic? Explain using Le Châtelier's principle e following pictures represent the initial and equilibrium states for the exothermic decomposition of gaseous A molecules (red) to give gaseous B molecules (bluc) 13.32 The following pictures represent equilibrium mixtures at 325 K and 350 K for a reaction involving A atoms (red), B atoms (blue),. and AB molecules: ant hat Initial state Equilibrium state (a) Write a balanced chemical equation for the reaction. (b) Will the number of A molecules in the equilibrium mixture increase, decrease, or remain the same after each of the fol- lowing changes? Explain. (1) Increasing the temperature (2) Decreasing the volume (3) Increasing the pressure by adding an inert gas (4) Adding a catalyst T 325 K T 350 K (a) Write a balanced equation for the reaction that occurs on b) Is the reaction exothermic or endothermic? Explain using the volume of the container is increased, will the number raising the temperature. Le Châtelier's principle. of A atoms increase, decrease, or remain the same? Explain.
Explanation / Answer
13.30
On opening stopcock, the reaction mixture will mix, now understand that once this mixes, there will be more of A-B molecules than A or that of B. Therefore by le chateliar principle that states: if the equilibrium of a system is disturbed then the system triesto adjust itself counteractingthe effect of the change. So A-B molecules dissociate and more of A, B atoms are formed. This is thus backward reaction of the given equilibrium reaction.
