Energy and State Change When a substance changes state: Solid liquid gas = gaining energy Gas liquid solid = loses energy
Measuring Gases Temperature: the measure of the motion (kinetic energy) of the particles of a substance.
Measuring Gases Cont… Pressure of a gas: The measure of the outward force divided by the surface area of the container.
Increased Temperature Increased average velocity of gas particles Increased number of collisions with walls of container Increased Force per collision. Inside pressure is greater than external pressure. Container expands Increased Volume Initial increase in pressure force ÷ area of container
Take out your Hot Air Balloons Lab and write down the Purpose: To Learn how the volume of a gas changes with temperature.