The equilibrium constant of a reaction at 27^o c is 1.6 and at 127^o c is 7.6 respectively. Is the reaction exothermic or endothermic?

(A) combination reaction

In endothermic reaction, heat is absorbed whereas in exothermic reaction, heat is evolved.

i. Endothermic ii. Exothermic iii. Exothermic  iv. Endothermic

(a) : For spontaneous process, ΔG = –ve Now ΔG = –RT ln K When K > 1, ΔG = –ve Again ΔGº = – nFEº When Eº = +ve, ΔGº = –ve

(c) :- The addition of second electron in an atom or ion is always endothermic.

(i) This is because of (a) bond dissociation enthalpy of F2 is lower than Cl2 and (b) fluorine forms stronger bond with nitrogen due to comparable size. (ii) As xenon is...

(i) Energy factor opposes .So enthalpy factor must favour , i.e. ,ΔS must be positive.  (ii) For A----> B , ΔG is –ve, therefore, for B----->A, ΔG will be +ve.  (iii) For B----->...

Kc=1/4..........

(d) The equilibrium constant will be 300.

(i) 2Na + 2H2O → 2NaOH + H2 It is an exothermic reaction. (ii)2FeSO4(s) → Fe2O3 + SO2(g) + SO3(g) It is an endothermic reaction.