The Boyle’s Law and Charles’s Law Gizmo shows a container of gas. Inside, small purple spheres represent gas molecules. 1. Observe the particles. Are they all moving at the same speed?

2. How do the particles interact with the walls and lid of the container? These interactions contribute to the pressure on the walls of the container. The pressure is defined as force per unit area. The SI units of pressure are newtons per square meter (N/m2), or pascals (Pa).

3. Slowly drag the temperature (T) slider back and forth. (Note: In this Gizmo, the Kelvin scale is used to measure temperature. On the Kelvin scale, 0 degrees is absolute zero, the coldest possible temperature. Absolute zero is equal to -273.15 °C or -459.67 °F)

A. How does the change in temperature affect the speed of the molecules?
B. How does the change in temperature affect the volume of the container?