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1a) For which of the following reactions is ΔSo > 0? a. 2 C2H6(g) + 7...

1a) For which of the following reactions is ΔSo > 0?

a.

2 C2H6(g) + 7 O2(g) à 4 CO2(g) + 6 H2O(g)

b.

H2CO(g) + O2(g) à CO2(g) + H2O(l)

c.

N2(g) + 3 H2(g) à 2 NH3(g)

d.

 NH3(g) + HI(g) à NH4I(s)

1b) For a particular chemical reaction ΔH = 7.0 kJ and ΔS = –17 J/K. Under what temperature condition is the reaction spontaneous?

a) When T > 412 K.

b) The reaction is not spontaneous at any temperature.

c) The reaction is spontaneous at all temperatures.

d) When T < –412 K.

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