Question

= Objective Knowledge Check Consider the following chemical equilibrium: C(s)+2H, (g) =CH, (g) Now write an equation below that shows how to calculate K, from K for this reaction at an ab room temperature. If you include any common physical constants in your equation be sure you K = 0 X 6 X

Answer 1

Write the reaction as follows: C(s)+2H2(g) → CH, (8) Equilibrium constant is defined as the ratio of product of concentrations of products raised to the powers of their stoichiometric coefficients to the product of concentrations of reactants raised to the powers of their stoichiometric coefficients. x = [CH... (1) Since Cis in solid state, the concentration of C is omitted in the above expression. -------------------------------- The relation between K, and K, is as follows: Ky=K (RT) ...... (2) An = no. of moles of gaseous products – no. of moles of gaseous reactants An = 1-2= -1 ga consatant, R = 0.0821 Temperature, T = 25°C = 25+273K= 298 K Substitute the corresponding values in equation (2), K;=K, (RT) K,- (0.0821x298 k)* 5,- ; (24 4858)" K,=0.0409. Therefore, the required solution is |K,=0.0409! or K = 0.0409xK