Answer
$K = 18.53$
Work Step by Step
We have
$T_1 = 20^oC = 293K$
$T_2 = 5^oC = 278K$
Therefore
$K = \frac{T_2}{T_1-T_2}$
$K = \frac{278K}{293K-278K}$
$K = 18.53$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.