Chemistry · Differential and integral forms of zero and first-order reactions, their characteristics and half-lives
For a general reaction the plot of conc. of vs time is given in the figure. What
For a general reaction \( \boldsymbol{X} \rightarrow \boldsymbol{Y}, \) the plot of conc. of \( \boldsymbol{X} \) vs time is given in the figure. What is the order of the reaction and what are the units of rate constant?
- A. zero, mol \( L^{-1} s^{-1} \)
- B. First, \( \operatorname{mol} L^{-1} s^{-1} \)
- C. \) First, \( s^{-1} \)
- D. zero, L mol- \( s_{s}^{-} \)
Step-by-step solution
For a zero-order reaction, the concentration of reactant decreases linearly with time, as the rate is independent of concentration. The rate constant has units of concentration per time (mol L^{-1} s^{-1}). The figure (not shown) typically depicts a straight line for zero-order kinetics, with slope = -k. In contrast, first-order reactions show exponential decay with rate constant units s^{-1}.
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