Consider the chemical reaction involving gaseous compounds E and G producing gas
ID: 701009 • Letter: C
Question
Consider the chemical reaction involving gaseous compounds E and G producing gaseous product R at a particular temperature according to the equation: 2 Eg) + 2Gg5 Rg) where the blanks are to be filled in with coefficients. Choose coefficients (either 2 or 5) for each blank in the chemical equation such that they cannot be reduced to simpler terms, and choose initial amounts of compounds E and G (acceptable range for each amount is from 4.25 mol to 6.25 mol with three significant figures that are nonzero). No amount of R is present initially, but choose an amount of R (with three significant figures) that is present at equilibrium such that reasonable answers to part a and part b may be obtained. a. Determine the equilibrium constant, K, for this reaction in a 3.00 L glass container at the particular temperature: 2E(g)+2G(g) 5R(g) with the initial amount of 5.25 mol ofE and the initial amount of .45 mol of G and the equilibrium amount of 5.35 mol of R (present after equilibrium is established). (Fill in the blanks with acceptable values.)Explanation / Answer
Equillibrium constant = Concentraion of products raised to their stoichiometric coffecients/ Concentraion of reactants raised to their stoichiometric coffecients
Initial concentration of E = 5.25 mol in 3 L = 5.25 mol/0.003 m3 = 1750 mol/m3
Initial concentration of G = 5.45 mol in 3 L = 5.25 mol/0.003 m3 = 1816.66 mol/m3
equillibrium concentration of R = 5.35 mol in 3 L = 5.35 mol/0.003 m3 = 1783.33 mol/m3
Amount of E use for R = 1783.33 * 2/5 = 713.332 mol/m3
Concentration of E at equllibrium = 1750 - 713.332 = 1036.668 mol/m3
Amount of G used up for R = 1783.33*2/5 = 713.332 mol/m3
Concentration of G at equllibrium = 1816.666 - 713.332 = 1103.334 mol/m3
Kp = [R]5/[E]2[G]2 = [1783.33]5/[1036.668]2[1103.334]2 = 13773.95 mol/m3
Kp = 13.774 mol/L
The answer has been computed for the values given in the blanks. For a three decimal point number, similar calculations can be carried out.