CHAPTER 10 Flashcards
Gases can be thought of as?
-Point particles
-Constant random motion
-Frequent collisions with walls of container
-Do not interact with each other
What 4 variables is gas defined by
-Volume
-Pressure
-Temperature
-Moles
If temperature goes up?
The particles move faster
What is kinetic energy?
is the energy of motion and temperature is directly correlated to kinetic energy.
An________ in temperature is an increase in speed of _____________
- Increase
- The Particles
What is the formula of Kinetic Energy?
KE= A x T
What is the formula for pressure?
P= Force/ Area
What is pressure?
-Force is often thought of as applied energy
-The particles have energy and fly around toward the walls
-The walls have an area that a force can act upon through collision.
-In our gas model, pressure can be thought of as the frequency of collisions.
What are ways to measure pressure?
- Atmospheric pressure
- Barometer
What is Atmospheric Pressure?
-Resulting force per unit area
-When earth’s gravity acts on molecules in air
-Pressure due to air molecules colliding with object
What is barometer
Instrument used to measure atmospheric pressure.
What is a Torricelli Barometer
-Simplest barometer
-Tube that is filled with mercury
-Sealed at one end
what does the height of mercury define?
The atmospheric pressure
What is the STP
730 to 760 mmHg
What is standard atmosphere (atm)
-Average pressure at sea level
-Pressure needed to support column of mercury 760 mm high measured at 0 C
