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The student is able to make claims about how the pressure of an ideal gas is connected to the force exerted by molecules on the walls of the container, and how changes in pressure affect the thermal equilibrium of the system.
The student is able to make claims about how the pressure of an ideal gas is connected to the force exerted by molecules on the walls of the container, and how changes in pressure affect the thermal equilibrium of the system.
"If, in some cataclysm, all scientific knowledge were to be destroyed, and only one sentence passed on to the next generation, what statement would contain the most information in the fewest words?"
"If, in some cataclysm, all scientific knowledge were to be destroyed, and only one sentence passed on to the next generation, what statement would contain the most information in the fewest words?"
Feynman: What things really are like FUN TO IMAGINE
Feynman: What things really are like FUN TO IMAGINE
Physicist Richard Feynman thinks aloud about atoms and how they 'jiggle', and how we perceive that jiggling as 'hot' and 'cold'. From the BBC TV series 'Fun to Imagine'(1983)
"I believe it is the atomic hypothesis (or atomic fact, or whatever you wish to call it) that all things are made of atoms--little particles that move around in perpetual motion, attracting each other when they are a little distance apart, but repelling upon being squeezed into one another. In that one sentence, you will see there is an enormous amount of information about the world, if just a little imagination and thinking are applied."
"I believe it is the atomic hypothesis (or atomic fact, or whatever you wish to call it) that all things are made of atoms--little particles that move around in perpetual motion, attracting each other when they are a little distance apart, but repelling upon being squeezed into one another. In that one sentence, you will see there is an enormous amount of information about the world, if just a little imagination and thinking are applied."
Express the ideal gas law in terms of molecular mass and velocity (13.4)
Express the ideal gas law in terms of molecular mass and velocity (13.4)
Define thermal energy (13.4)
Define thermal energy (13.4)
Thermal Energy
Thermal Energy
Thermal energy refers to the energy contained within a system that is responsible for its temperature. Heat is the flow of thermal energy.
Thermal energy refers to the energy contained within a system that is responsible for its temperature. Heat is the flow of thermal energy.
Heat
Heat
Heat is simply the net transfer of energy between objects that have different temperatures. The direction of heat flow depends on temperature. Heat energy (or just heat) always from hot objects (higher average KE) to cold objects (lower average KE).
Heat is simply the net transfer of energy between objects that have different temperatures. The direction of heat flow depends on temperature. Heat energy (or just heat) always from hot objects (higher average KE) to cold objects (lower average KE).
Calculate the kinetic energy of a gas molecule, given its temperature (13.4)
Calculate the kinetic energy of a gas molecule, given its temperature (13.4)
Temperature
Temperature
Temperature is defined as the average KE (speed) of the particles (atoms or molecules).
Temperature is defined as the average KE (speed) of the particles (atoms or molecules).
ex. A bucket of water at 300 K the same temperature as a cup of water at 300 K. Their particles have the same average speed.
ex. A bucket of water at 300 K the same temperature as a cup of water at 300 K. Their particles have the same average speed.
Thermal Energy
Thermal Energy
Thermal energy is defined as the average KE (speed) and the mass of the particles.
Thermal energy is defined as the average KE (speed) and the mass of the particles.
ex. A bucket of water at 300 K has more thermal energy than a cup of water at 300 K. Even though the particles are moving at the same average speed, there are so many more of them.
ex. A bucket of water at 300 K has more thermal energy than a cup of water at 300 K. Even though the particles are moving at the same average speed, there are so many more of them.
Describe the relationship between the temperature of a gas and the kinetic energy of atoms and molecules (13.4)
Describe the relationship between the temperature of a gas and the kinetic energy of atoms and molecules (13.4)
Describe the distribution of speeds of molecules in a gas (13.4)
Describe the distribution of speeds of molecules in a gas (13.4)
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