- #1

NasuSama

- 326

- 3

**V_RMS problem... Need help with it!**

## Homework Statement

Find T, the temperature at which O

_{2}gas molecules have an rms speed of v = 699 m/s.

## Homework Equations

It's the rms form I have used.

[itex]v_{rms} = √(3RT/M)[/itex]

## The Attempt at a Solution

Let

M = 32 g/mol ≈ 32 * 10^(-3) kg/mol

v_rms = 699 m/s

R = 8.314 J/(mol * K)

Attempted to solve for T. Here is what I have:

[itex]v_{rms}^{2} = 3RT/M[/itex]

[itex]T = v_{rms}^{2}M/(3R) [/itex]

Plug and chug in the values, and I got 627 K, which is not correct.