27 terms

Abeka Physics Chapter 15

This set covers A Beka Book Physics Chapter 15: "The Laws of Thermodynamics" (pages 222-235).
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Terms in this set (...)

system
term for any body or collection of bodies that can exchange energy with the surroundings
surroundings
term for anything outside a system
False
True or False: A system is required to exchange energy.
open system
term for a system that can exchange both mass and energy
isolated system
term for a closed system where not only can no mass cross the boundary, but also no energy can cross the boundary between the system and its surroundings
positive
Energy entering a system is _____ (positive, negative).
negative
Energy leaving a system is _____ (positive, negative).
heat
term for the energy that passses from one body to another
work
term for energy transfer caused by a force operating over a distance
equilibrium
If no energy tranfer (either in the form of heat or work) is ocurring among them, a system of bodies is at _____.
internal energy
term for the total molecular energy content of a physical system
thermal energy
term for the kinetic energy of particles as they vibrate or rush about
False
True or False: Work produces heat.
4.184
I calorie = ____ Joules
mechanical equivalent of heat
term for the amount of work equal to a unit of heat
thermodynamics
term for the study of the relationship between heat and work
energy, heat, work
According the the first law of thermodynamics, the change in internal _____ of a system equals the ___ added the the system minus the ____ that the system does on the surroundings.
closed
Apart from Q and W, a system for the first law of thermodynamics is assumed to be ____.
adiabatic
If no heat enters or leaves a system while its internal energy is changing, the process is _____.
isothermal
When the temperature of a gas is unchanged by compression, the compression is said to be ______.
irreversible process
term for a process that cannot be reversed after equilibrium is established to restore each quantity to its original value
reversible process
term for a process that can be reversed to regain the original quantities
PV = nRT
the ideal gas law
entropy
According to the second law of thermodynamics, in an isolated system, the direction of spontaneous change is always toward greater ____.
entropy
term for a measure of disorder
disorder (entropy), energy
A system always tends towards greater ____ and lower ____.
thermal equilibrium
term for the point at which two objects have the same thermal energy and no heat is transferred between them