Practice question
Question
A first-order gaseous reaction has an initial pressure of 0.6 atm. After 20 s, the total pressure is 0.9 atm. What is the rate constant?
Explanation
For A → 2B, x = 0.3, pA = 0.3. k = (2.303/20) log(0.6/0.3) ≈ 0.0346 s⁻¹.
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