The decomposition of NH3 on tungsten surface follows zero-order kinetics. The half-life is 315 s for an initial pressure of 70 mm of NH3. If the initial pressure had been 150 mm, what would be the hal

Question

The decomposition of NH3 on tungsten surface follows zero-order kinetics. The half-life is 315 s for an initial pressure of 70 mm of NH3. If the initial pressure had been 150 mm, what would be the half-life?

Prashant Kotian · Accepted Answer

Correct answer: C. For a zero-order reaction, t1/2 is directly proportional to the initial concentration (or pressure). t2 = t1 × (P2 / P1) = 315 × (150 / 70) = 675 s. Therefore, correct answer is C.

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