saabrrinnaaa
27.11.2019 •
Chemistry
If the absolute temperature of a gas is tripled, what happens to the root‑mean‑square speed of the molecules?
a. nothing happens to the rms speed.
b. the new rms speed is 9 times the original rms speed.
c. the new rms speed is 3 times the original rms speed.
d. the new rms speed is 1.732 times the original rms speed.
e. the new rms speed is 1/3 the original rms speed.
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Ответ:
D. The new rms speed is 1.732 times the original rms speed.
Explanation:
The expression for the root mean square speed is:
R is Gas constant having value = 8.314 J / K mol
M is the molar mass of gas
T is the absolute temperature
As seen from the formula, root mean square speed is directly proportional to the square root of the absolute temperature.
So,
Given, absolute temperature of a gas is tripled, so, the new rms speed will be √3 (1.732) of the original.
Hence, the correct option is:- D. The new rms speed is 1.732 times the original rms speed.
Ответ:
b
Explanation: