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Terms in this set (27)
Definition of Temperature
A measure of the average kinetic energy of its atoms and molecules.
When do objects expand?
As temperature increases.
What three ways are there to accomplish heat as a transfer of energy?
Conduction, convention, radiation.
When does thermal equilibrium occur?
When two or more objects are the same temperature.
What is the first law of thermodynamics?
The change in internal energy of a system is equal to the heat added to the system plus the work done by the system.
What are the assumptions made about an "ideal" gas?
Molecules have a mass of u with different velocities, kinetic energy is conserved, we only consider collisions, and the distance between molecules are much greater than the diameter of the molecules.
What does STP stand for?
Standard Temperature Pressure
True or False: As objects increase in temperature the molecules move faster and they expand.
True or False: If an object has a hole in it, and is heated, the hole DOES NOT expand.
Internal or Thermal Energy
The sum of all the molecular kinetic energy in a substance.
True or False: In the rate of heat flow, the higher the difference in temperatures, delta T, the faster heat flows.
True or False: In the rate of heat flow, the shorter the path length L, the longer heat is transferred through the molecules.
True or False: Heat transfers faster in some materials than in others.
True or False: The particles of a gas vary in speed.
In an isobaric process, what remains constant?
Pressure remains constant.
In an isochoric or isovolumetric process, what remains constant?
Volume remains constant.
In an adiabatic process, what remains constant?
How many molecules are there in each mole of an ideal gas?
6.022x10^23 molecules per mole
True or False: If we compress a gas while keeping the temperature constant, the pressure increases.
How do you convert from degrees Celsius to Kelvin?
When volume decreases what happens to the pressure?
The pressure increases.
If the average kinetic energy of the molecule increases, what change can be observed?
What does temperature depend on?
What does heat depend on?
Speed and mass.
The temperature in a room drops when someone opens the door and a cold winter wind blows in
The winter sun feels warm on your face
Frozen bacon sizzles in a hot frying pan
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