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For a reaction 2AB+C, Kc is 2×10-3. At a given time, the reaction mixture has [A]=[B]=[C]=3×10-4M. Which of the following options is correct?

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Important Questions on Chemical Equilibrium

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Following lists contain reactions and their corresponding equilibrium constants at different temperatures:

List - I (Reaction) List - II Kp
2SO2( g)+O2( g)2SO3( g) at 298 K 4.0×1024
2SO2( g)+O2( g)2SO3( g) at 700 K 3.0×104
N2O4( g)2NO2( g) at 298 K 0.98
N2O4( g)2NO2( g) at 500 K 1700

If H10 and H20 are the standard enthalpies for the reactions 2SO2 + O2  2SO3 and N2O4  2NO2  respectively, then: 

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The equilibrium constant Kp for the formation of ammonia from its constituent elements at 27°C is 1.2×10-4 and at 127°C is 0.60×10-4. Calculate the mean heat of formation of ammonia per mole in this temperature range.
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At 298 K, the equilibrium constant of the process 1.5O2 (g)O3 (g) is 3×10-29. Standard free energy change (in kJ mol-1 ) of the process is approximately R=8.314 J mol-1 K-1; log 3=0.47