Dinitrogen tetraoxide and nitrogen dioxide are two gases that exist in equilibrium at a range of temperatures. no2 is a reddish brown gas while n2o4 is at high temperature the red color is strong. at low temperature the gas has less color. we represent the equilibrium as: 2 no2(g) doublearrow. gifn2o4(g) we can conclude that: 1. this reaction is: a. exothermicb. endothermicc. neutrald. more information is needed to answer this question.2. when the temperature is decreased the equilibrium constant, k: a. increasesb. decreasesc. remains the samed. more information is needed to answer this question.3. when the temperature is decreased the equilibrium concentration of no2: a. increasesb. decreasesc. remains the samed. more information is needed to answer this question.