(b) (5) a) write the equilibrium constant expression for the reaction: N20g) 3H2
ID: 522051 • Letter: #
Question
(b) (5) a) write the equilibrium constant expression for the reaction: N20g) 3H20g) 2NHy(g) b Calculate the equilibrium constantin: IN2l 0.071 M: IH2l 9.2x10 M: INE,l 1.8x10 M Assign Chapter 7-Energy, Rate, and Equilibrium The following reaction is exothermic: (a) Write a balanced equatioa for the reaction (red spheres represeats A atoms and ivory spheres represents B atoms). b) What are the sigus or -)ofAH and AS for the reaction? (e) Is the reaction likely to be spoataneous at lower temperatures ly, at higher temperatures only, or at all temperature? Page 3 of3Explanation / Answer
For the given reaction,
K= equilibrium constant= [NH3]2/ [N2] [H2]3=
(1.8*10-4)2/ { 0.071*(9.2*10-3)2= 5.4*10-5
6AB2 -----à 6A+ 12B
The reaction is exothermic and deltaH is –ve. Entropy is degree of disorder and degree of disorder has increased in product than in reactants. Hence entropy is +ve.
Since deltaG= deltaH-T*deltas, Gibbs free energy is –ve and hence spontaneous.
since rhe reaction is exothermic, the reaction is feasible at low temperatures only. since increased temperatrues favors back ward reaction.