Kinetic molecular theory

The diagram below represents three samples of

He (g)

in identical rigid containers. The lengths of the arrows indicate the speeds of the atoms in each sample.

Based on the diagram, the pressure of the $He (g)$ ‍ is

The AP Chemistry exam includes a section of equations and constants that you can reference during the exam. A subset of this reference is shown below.

Gas equations:

\begin{aligned} P V & = n R T \\ P_{1} & = P_{total} \times χ_{1}, where χ_{1} = \frac{moles of gas 1}{total moles} \\ P_{total} & = P_{1} + P_{2} + P_{3} + . . . \\ K & = ° C + 273 \\ K E per molecule & = \frac{1}{2} m v^{2} \end{aligned}

Gas variables and constants:

\begin{aligned} P & = pressure \\ V & = volume \\ T & = temperature \\ n & = number of moles \\ m & = mass \\ v & = velocity \\ R & = 8.314 J {mol}^{- 1} K^{- 1} \\ = 0.082 06 L atm {mol}^{- 1} K^{- 1} \\ = 62.36 L Torr {mol}^{- 1} K^{- 1} \end{aligned}

Chemistry library

Course: Chemistry library > Unit 8

Problem