Tutorial 1 -Characteristies o Dynamuc Equiubrium NO2is a dark brown colour. All

Question

Tutorial 1 -Characteristies o Dynamuc Equiubrium NO2is a dark brown colour. All of the other gases are colourless. Describe what will happen to the colour of the gas mixture from when the NO2 and the CO are mixed until equilibrium is established k) One mole of NO and one mole of CO2 are mixed. If left alone at a constant temperature will be established. Once this equilibrium is reached, will be colour be different than the equilibrium in question j? 2. Given the reaction: co,g) + Ch(g) F± COCO One mole of CO and one mole of Ch are mixed at a certain temperature. On the axes below, draw graphs which show how the rates of the forward reaction and the reverse reaction vary with time. Reaction Rate Time 3. Give four characteristics of a system at equilibrium 2. 3. 4. After you have completed this Self-Test, check answers on "Tutorial 1 Soluationr"-page 1. This is the end of Tuorial 1-See your teacher if there is something you don't understand Paee 9 Tutorial 1

Explanation / Answer

j) NO2(g) +CO(g) <--->NO(g)+CO2(g) (Equilibrium condition)

NO2 reacts spontaneously with CO and produces colorless gases NO and CO2 .So,the brown color of the NO2 will decrease as its amount decreases, until at equilibrium ,the equilibrium concentrations or amounts of NO2,CO,NO,CO2 is there,giving a less intense brown color to the mixture(as only little amount of NO2 is left over)

k)If left alone at a constant temperature ,NO(g)+CO2(g)<--->NO2(g) +CO(g) is established.Once this equilibrium is reached ,the color of NO2 being brown ,will turn the mixture appear brown. As all the other gases are colorless,before reaching equilibrium ,the gas mixture was colorless.

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