The brown gas NO2 and the colorless gas N2O4 exist in equilibrium: 2NO2 = N2O4 In an experiment, 0.625 mole of N2O4 was introduced into a vessel of 5.0 L and was allowed to decompose until it reached equilibrium with NO2. The concentration of N2O4 at equilibrium was 0.075 M. Calculate Kc for the reaction. (Hint: remember the ICE procedure? initial, change, and equilibrium)

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock