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MMLU / Suppose that the 13C nuclei in a molecule in a 600 MHz spectrometer can be 100%…

Problem

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question

Suppose that the 13C nuclei in a molecule in a 600 MHz spectrometer can be 100% polarized (p = 1). If T1 = 5.0 s, how long does it take for p to reach a value equal to twice the thermal equilibrium polarization at 298 K?

choices

  1. [The polarization relaxes exponentially: p(t) = [p(0) - peq]exp(-t/T1) + peq.]
  2. 72.0 s
  3. 56.6 s
  4. 12.7 s

subject

college_chemistry

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Source and history

Official source

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