A colorless crystalline compound when dissolved in water formed a color solution this compound was heated in a clean dry test tube this heating produced several droplets of water on the upper region of the test tube. The residue was dissolved in water and formed a yellow brown solution

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :

im not exactly sure but i think its b!