18. for the following equilibrium reaction, which cause and effect are correctly

Question

18. for the following equilibrium reaction, which cause and effect are correctly matched? CO+2H2CH3OH+heat A) add heat, shift right B.) add CO, shift left C.) remove CH3OH, shift left D.) remove H2, shift right E.) remove heat, shift right 19. To make a chemical reaction occur, the activation energy is the energy that A.) must be removed from the reaction mixture, if endothermic B.) must be released from the reaction of exothermic C.) initiates the reaction, which then may spontaneously proceed D.) activates the catalyst E.) all of the above 20. In the following reaction, what is the effect of adding more NO2 to the starting reaction mixture? A.) It would make the reaction more endothermic B.) It would make the reaction more exothermic C.) It would slow the reaction down D.) It would decrease the final quantity of products E.) It would increase the final quantity of products

Explanation / Answer

ans)

18) given data

CO(g) + 2H2(g)< -------> CH3OH(g) + heat

Removal of H2 the equilibrium shift left side

Removal of CH3OH the equilibrium shift to right side.

Forward reaction is exothermic reaction,at low temperature forward ( equilibrium ) shift right side.

so option D iscorrect

20)

given reaction

2NO2(g) <-------> N2O4(g)

according to Lechateliers principle addition of reactants favours the forward reaction the equilibrium shifts right

Now, addition of NO2 will increase the final quantity of products as to reach the equilibrium state, more NO2 has to be consumed

Thus, the correct answer is (e)

it would increases the final quantity of products

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