Module 7. 1. Label everything appropriately. Show linear increments along axes. The following gas-phase reaction takes place inside a closed chamber: $$ 3 A+B[2 \mathrm{C} $$. The initial concentrations are: $$ [C] O= $$ $$ 0.0 \mathrm{M},[\mathrm{A}] \mathrm{O}=[\mathrm{B}] \mathrm{O}=0.20 \mathrm{M} $$ The reaction is first order in A and zeroth order in B . The rate constant in the rate equation for this first-order reaction at a certain temperature is $$ 3,465 imes 10 $$ - $$ 2 \mathrm{~min}-1 $$ Determine the half-time for this process at this temperature and use this information to show plots on the same graph for the time course of concentrations for $$ [A],[B] $$, and $$ [C] $$ from the initial concentrations until one of the substances (the limiting reagent) is completely exhausted.

Question

Module 7. 1. Label everything appropriately. Show linear increments along axes. The following gas-phase reaction takes place inside a closed chamber: $$ 3 A+B[2 \mathrm{C} $$. The initial concentrations are: $$ [C] O= $$ $$ 0.0 \mathrm{M},[\mathrm{A}] \mathrm{O}=[\mathrm{B}] \mathrm{O}=0.20 \mathrm{M} $$ The reaction is first order in A and zeroth order in B . The rate constant in the rate equation for this first-order reaction at a certain temperature is $$ 3,465 	imes 10 $$ - $$ 2 \mathrm{~min}-1 $$ Determine the half-time for this process at this temperature and use this information to show plots on the same graph for the time course of concentrations for $$ [A],[B] $$, and $$ [C] $$ from the initial concentrations until one of the substances (the limiting reagent) is completely exhausted.

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The half-life of the reaction is approximately 20 minutes. The limiting reagent is $$ A $$. The concentrations of $$ A $$, $$ B $$, and $$ C $$ will change over time as follows: $$ [A] $$ decreases, $$ [B] $$ remains constant until $$ A $$ is exhausted, and $$ [C] $$ increases. Plot these changes on a graph with time on the x-axis and concentration in M on the y-axis.

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