Nitrogen and oxygen gases react reversibly to produce gaseous N2O4 in a 4.00 L container being held at 278 K. 2.00 mols of each reactant and 1.00 mol of the product are initially placed into the...

Extracted text: Nitrogen and oxygen gases react reversibly to produce gaseous N2O4 in a 4.00 L container being held at 278 K. 2.00 mols of each reactant and 1.00 mol of the product are initially placed into the container, and once the reaction establishes equilibrium, the molarity of oxygen gas is measured as 0.150 M. Answer the questions below.


Extracted text: Let's go back to the original equilibrium position established by the reaction, with the equilibrium molarity for oxygen gas as 0.150 M. The temperature for the reaction is now changed to 578 K, and the new equilibrium molarity for oxygen gas is found to be 0.055 M. Is the reaction endothermic or exothermic, as written? Circle and explain your answer below. endothermic exothermic