12. For each reaction below determine if the entropy (AS) and enthalpy (AH) favo

Question

12. For each reaction below determine if the entropy (AS) and enthalpy (AH) favours the reactants (R) or products (P). Based on that information determine if the reaction will go to completion (C), form an equilibrium (E) or if there is no reaction (NR). Reaction (AS (AH) Result 2 CsH 18a) + 25 O2e) 16 CO2(g) + 16 H20(g) + 10 110 kJ ? 6SOCI2(s) + CoCl2·6H2O(aq) CoC12(aq) + HCl(aq) + 6SO2(g) ? AH = +360 kJ 2BiCl3(aq) 3H2S(g) 510 kJ ? 1BbS3(s) 6HCI(aq) + + + NaCla) AgCl(s) NaNO3(aq) + 315 kJ + AgNO3(aq) + ?

Explanation / Answer

dS will favour side where more gas molecules present

dH will faour products if dH is negative. If dH is +ve it favours reactants . If energy is given in equation then dH favours side where energy is given.

dH is dominating factor than dS. Considering these

for reaction 1 dS favours products , dH favours products . Result completion

for reaction 2, dS favours products , dH favours reactants. Result equilibrium

for reaction3 , dS favours reactants side , dH favours reactants side .Result is No reaction

for reaction 4 , dS favuors reactants , dH favours product side. Result is equilibrium

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