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$\begingroup$ so the kinetic energy only takes into account the translational modes? $\endgroup$
– Cyclopropane
Commented Jan 27, 2020 at 5:34
6

$\begingroup$ @DrPepper No, the kinetic energy is the sum of the translational, vibrational, and rotational kinetic energy. The speed, however, is due only to the translational (as opposed to rotational or vibrational) kinetic energy. This is because translational kinetic energy is the energy the molecules have as a result of how fast they move (i.e., translate) through space (and their mass). $\endgroup$
– theorist
Commented Jan 27, 2020 at 5:46
$\begingroup$ Thank you so much! I understand it now :) Your comment was very helpful. $\endgroup$
– Cyclopropane
Commented Jan 27, 2020 at 14:14

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