If 3.50 g of Ni are reacted with excess oxygen to form nickel oxide (NiO)under standard state conditions,what is the entropy change for the reaction? 2 Ni(s)+ O₂(g)$\leftrightarrows$ 2 NiO(s)

Question

Quizplus · Accepted Answer

To calculate the entropy change for the reaction, we need to calculate the difference in entropy between the products and reactants. Using the standard state entropies given in the table, we can calculate:

ΔS = 2S(NiO) - 2S(Ni) - S(O2)

ΔS = 2(37.99 J/K/mol) - 2(28.61 J/K/mol) - 205.0 J/K/mol

ΔS = -14.7 J/K/mol

Therefore, the entropy change for the reaction is -14.7 J/K, which corresponds to choice C.

If 350 G of Ni Are Reacted with Excess Oxygen to to Form