Classify each of the following reactions as one of these four types: â€¢ spontaneous at all temperatures...

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Chemistry

Classify each of the following reactions as one of these fourtypes:
â€¢ spontaneous at all temperatures â€¢ not spontaneous at anytemperature â€¢ spontaneous below a certain temperature but notabove
â€¢ spontaneous above a certain temperature but not below
(a) PbS (s) + Mg (s) â†’ Mg (s) + Pb (s); âˆ†H = 66 kJ; âˆ†S = -9J/K
(b) 2 SO2 (g) + O2 (g) â†’ 2 SO3 (g); âˆ†H = -197.8 kJ; âˆ†S = -188.1J/K
(c) 2 N2O (g) + O2 (g) â†’ 4 NO (g); âˆ†H = 199.5 kJ; âˆ†S = 198.2J/K
(d) 2 C8H18 (l) + 25 O2 (g) â†’ 16 CO2 (g) + 18 H2O (g); âˆ†H =-10139 kJ; âˆ†S = 977 J/K

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3.9 Ratings (720 Votes)

From the second law of thermodynamics G H TS The criteria of spontaneity of a reaction is G 0 For reaction a H 0 S 0 Temperature T is always 0 Hence G 0 at all See Answer

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