6) Calculate AS rxn for the following reactionat 298 K. The Sº for each species is shown below the reaction: S°(J/mol K) A) +160.0 J/K 4 NH3(g) + 5 O2(g) 192.8 205.2 B) +178.8 J/K 4 NO(g) + 6 H2O(g) 210.8 188.8 C) +287.4 J/K D) -401.2 J/K E) -336.6 J/K

For the reaction given below, AH --1516 kJ at 25"C und AS--432.8 J/K at 25°C, This reaction is spontaneous SiH,(g) + 2 0:(g) SiO;()+2 H,0(6)

The decomposition of copper (1) oxide to its elements does not occur spontaneously at 375°C (AG = 140.0 kJ): Cu₂0 (s) 2 Cu (s) + 1/2O₂(g). It can be made to occur spontaneously by being coupled to the oxidation of solid carbon to form carbon monoxide gas at this same temperature (AG = -143.8 kJ): C(s) + 1/2O₂(g) → CO (g) What product(s) is/are produced as a result of coupling the two reactions? CO (g) 2 Cu (s) and 1/2 O₂ (g) 2 Cu (s) and CO (g) 2 Cu (s), 1/2 O2 (g), and CO (g) 1/2 0₂ (g)

The formation reaction for carbon dioxide at 298 K is: C(s) + O₂(g) → CO₂(g) AƒH° = −393.51 kJ/mol Determine A, Hº at 1000 Kelvin given the following data: Cp values: carbon is 8.53 J/Kmol; oxygen gas is 29.36 J/Kmol; carbon dioxide gas is 37.11 J/Kmol.