CHEMICAL KINETICS ch 20-13. Consider the gas reaction retween the start of react

Question

CHEMICAL KINETICS ch 20-13. Consider the gas reaction retween the start of reaction and Time 1. tus rhasgos io concestration of reactants and products Time Which event is most likely to have occurred at Time 1? (A) addition of X (B) addition of Y (C) addition of Z (D) removal of Y (E) removal of Z 20. 21. Which gives the rate of changes in concentrations that occur as the reaction proceeds from Time 1 to Time 2? TYl decreases [21 decreases (A) decreases increases (D) increases (E) increases 22. When the lines for X, Y and Z are extended to time 2, which feature of those extensions is most closely related to the coefficients of the reactants, X and Y, in the equation for the reaction? (C) A(Z)

Explanation / Answer

Solution:

20. Addition of [X]

21. Decreases, Decreases, Increases

22. It should be either -d[X]/dt or -d[Y]/dt or +d[Z]/dt.

But it is not present.

Hence, [X] + [Y] would be the correct answer.

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