Which of the following choices would have a negative entropy change? A. H2O(s)−>H2O(l) B. CaCO3(s)−>CaO(s)+CO2(g) C. Fe2O3(s)+3C(s)−>2Fe(s)+3CO(g) D. N2(g)+3H2(g)−>2NH3(g)

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