KMT
What are the three assumptions about gasses in the Kinetic Molecular Theory.
1. particles are in constant, random motion.
2. particles do not attract each other
3. particles move independently
Huge weather balloons partially filled with helium are sent high into the earth’s atmosphere to examine the air. As a balloon rises into the air, the air pressure outside the balloon decreases rapidly. As this happens, the volume of the balloon will go ____. Explain why this happens.
up. Volume and pressure are inversely proportional. Less pressure means the particles hit the walls less often, which only happens at a larger volume
Convert
12^@C
to Kelvin
289 K
this is the amount of space that a gas takes up
volume
What is it about particles that causes temperature? (in other words, what are the particles doing that causes temperature?)
the speed of the particles
When a popcorn kernel is heated up, the pressure inside the kernel goes ____. Explain why this happens.
up. Temperature and pressure are directly proportional. Faster moving (high temperature) particles hit the walls of the kernel more often.
Convert 450 K to °C.
177 °C
What is it called when increasing one measurement leads to a decrease in a second measurement?
inversely proportional
What causes pressure at the microscopic level? (in other words, what are the particles doing that causes pressure?)
particles bouncing off the sides of the container
When you put a balloon in the refrigerator, its volume goes ____. Explain
down. Temperature and volume are directly proportional. Slower moving particles don't need as much room to move around.
What is special about a temperature of 0 K?
absolute zero; particles stop moving
What is it called when increasing one measurement leads to a increase in a second measurement?
directly proportional
If you are studying how temperature and volume are related, what variable must you hold constant?
pressure
When you add air to a balloon, its pressure goes ____. Explain why this happens on the microscopic level.
What is special about a temperature of 0°C?
water freezes
What is a measurement that does not change during an experiment called?
constant
Give a 2-5 word explanation of what "kinetic molecular theory" means
The molecules in gasses move!
When you drive on your tires for a long time in the winter time the pressure goes ___. Explain why this is.
up. driving heats up the tires. Temperature is directly proportional to pressure
Temperature is a measure of which kind of energy?
Kinetic Energy
This is the force applied across an area
pressure