Appeared in: 2024 (3 sets)
The thermal decomposition of an acid is a first order reaction with a rate constant of $2.3 \times 10^{-3} \text{ s}^{-1}$ at a certain temperature. Calculate how long it will take for three-fourths of the initial quantity of acid to decompose.
(log 4 = 0.6021, log 2 = 0.301)
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Official Evaluation Steps & EL10 Insight
Step 1 (Formula / Governing Law & Given Data): [0.5 Mark]
For a first-order reaction, the integrated rate law equation is given by:
$$t = \frac{2.303}{k} \log \frac{[R]_0}{[R]}$$Given Data: