Calculate the standard Gibbs energy of reaction for the following: Cu2S (s) + O2 (g) -> 2 Cu (s) + SO2 (g) using the following information. Cu2S (s) -> 2 Cu (s) + S (s) has a standard Gibbs energy of reaction of 86.2 kJ/mol and S (s) + O2 (g) -> SO2 (g) has a standard Gibbs energy of reaction of -300.1 kJ/mol.

Using this reversible reaction, answer the questions below: n2o4 2no2 (colorless) (reddish-brown) -as the temperature increased, what happened to the n2o4 concentration? -was the formation of reactants or products favored by the addition of heat? -which reaction is exothermic? right to left or left to right? -if the change of enthalpy of this reaction when proceeding left to right is 14 kcal, which chemical equation is correct? n2o4 2no2 + 14 kcal n2o4 2no2, hr = +14 kcal n2o4 + 14 kcal 2no2 n2o4 2no2, hr = -14 kcal