As a result of cooling of an ideal gas, its pressure decreased by 4 times, and the concentration of molecules
| June 2, 2021 | education
As a result of cooling of an ideal gas, its pressure decreased by 4 times, and the concentration of molecules did not change, while the average kinetic energy of molecular motion a) decreased by 16 times; b) decreased by 2 times; c) decreased by 4 times; d) did not change … Why?
To calculate the desired change in the kinetic energy of motion, we use the ratio: Pk / Pn = (2 * n * Ekk / 3) / (2 * n * Ekn / 3) = Ekk / Ekn, whence we express: Ekk = Pk / Pn * Ekn = k * Ekн.
Variables: k – pressure decrease (k = 1/4 p).
Calculation: Ekk = k * Ekn = 1/4 * Ekn.
Answer: The kinetic energy of the movement of molecules has decreased by 4 times.
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