Gases Flashcards
Pressure
the normal force applied to a unit area of a surface
Temperature
measures average kinetic energy
Volume
the amount of space something takes up
Charles Law
Temp vs Volume
- As temp increases, volume increases
- Direct relationship
Gay Lussac’s Law
Temp vs Pressure
- As temp increases, pressure increases
- Direct relationship
Boyle’s Law
Pressure vs Volume
- As pressure increases, volume decreases
- Indirect relationship
Gases of the same volume have:
the same number of molecules
Combined Gas Law Equation
P1 V1 P2 V2
——– = ———-
T1 T2
What are things that you need to remember for using combined gas law?
- Cross out all values that are held constant
- Always put temp in KELVIN
- STP is on Table A
400mL of gas, at constant Pressure, is at 50°C. What will be the new volume at 300°C?
2400 mL
Kinetic Molecular Theory
Used to explain the behavior of gases
Shows relationships between pressure, volume, and temperature on gases
Part 1 of KMT
Gas particles are in constant, random, straight-line motion and only change direction when they collide
Part 2 of KMT
When particles collide with one, another energy is transferred (not lost) from one particle to another
Part 3 of KMT
Particles are so small that their volumes are considered to be zero (negligible)
Part 4 of KMT
Gas particles have no attractive forces for one another!