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77julia77 [94]
3 years ago
12

A certain indicator has a color chart that shows that when the indicator is yellow, the solution is acidic. What is true about a

solution that produces a yellow indicator?
Chemistry
1 answer:
bija089 [108]3 years ago
4 0
It’s acidic?
It tastes sour
It has at least one hydrogen molecule
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The activation energy for proline isomerization of a peptide depends on the identity of the preceding residue and obeys Arrheniu
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Answer:

Activation energy of phenylalanine-proline peptide is 66 kJ/mol.

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According to Arrhenius equation-     k=Ae^{\frac{-E_{a}}{RT}}    , where k is rate constant, A is pre-exponential factor, E_{a} is activation energy, R is gas constant and T is temperature in kelvin scale.

As A is identical for both peptide therefore-

                                   \frac{k_{ala-pro}}{k_{phe-pro}}=e^\frac{[E_{a}^{phe-pro}-E_{a}^{ala-pro}]}{RT}

Here \frac{k_{ala-pro}}{k_{phe-pro}}=\frac{0.05}{0.005} , T = 298 K , R = 8.314 J/(mol.K) and E_{a}^{ala-pro}=60kJ/mol

So, \frac{0.05}{0.005}=e^{\frac{[E_{a}^{phe-pro}-(60000J/mol)]}{8.314J.mol^{-1}.K^{-1}\times 298K}}

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So, activation energy of phenylalanine-proline peptide is 66 kJ/mol

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