14 Thermal Physics Flashcards
What is the Triple Point
one specific temperture and prefure where the three phases can exit in thermal equilibrium (no net transfer of thermal energy between the phases)
Temperature and thermal equilibrium
If one obiect is hotter than another there is a net flow of thermal energy from the hotter object into the colder one.
When two objects are in thermal equilibrium there is no net flow of thermal energy between them.
what is The Zeroth Law of Thermodynamics
if two objects are each in thermal equilibrium
with athird, then all three are in thermalequilibrium with each other. In
other words, if both A and C are in thermal equilibrium with B, then Ais in thermal equilibrium with C.This means that all three objects are at the same temperature.
Celsius scale
Freezing point and boiling oint of pure water (atmospheric pressure is 1.01x10^5) as two fixed points with 100 increments.
Absolute temperature scale / thermodynamic temperature scale
0 K = 273.16 °C
change in 1k is the same as change in 1°C
Kinetic Model
Describes how all substances are made upof atoms or molecules which are arranged differently depening on phase
Describe the Kinetic model of solids
regularly arranged and packed closely together,
with strong electrostatic forces of attraction between them
holding them in fixed position, but can vibrate so have kinetic energy
Describe the kinetic model of liquids
still closely packed, but have more kinetic energy than in solids, they can change position and flow past each other.
Describe the kinetic model of Gases
With negligible electrostatic force they are much futher apart and can move past each other, unless they collide with each other or the container walls. They move in random directions with different random speeds.
