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 colorless. at high temperature the red color is strong. at low temperature the gas has less color. if we represent the equilibrium as: 2 no2(g) n2o4(g)

if we represent the equilibrium as: 2 no2(g) doublearrow. gifn2o4(g)
we can conclude that:

this reaction is:

a. exothermic
b. endothermic
c. neutral
d. more information is needed to answer this question.