First slide

Rms speed

Question

An ideal gas is heated at constant volume until its pressure doubles. Which one of the following statements is correct?

Easy

A

The mean speed of the molecules doubles.
B

The number of molecules doubles
C

The mean square speed of the molecules doubles.
D

The number of molecules per unit volume doubles.

Solution

At constant volume , P $\infty T . A l s o C^{2} = \frac{3 k T}{m} .$

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