Units/Symbols
SI Units for Heat
Joules (J)
Energy transferred between objects due to a difference in temperature.
Heat
What does the law of conservation of energy state?
All energy is conserved.
Energy cannot be created or destroyed only changed from one form to another.
Energy is removed from a system. Is it a positive or negative Q?
Negative
What does Q represent?
Heat
Heat transfer with fluids (liquid or gas).
Convection
Which law of thermo states that the total entropy always increases?
2nd law of thermo
What does Isothermal mean?
Temperature does not change
deltaT=0
SI Units for Temperature
Kelvin (K)
Heat transfer between you and your car seats (solids).
Conduction
Term for objects expand when temp increases.
Thermal expansion
Work done by a system (expansion of gas). Positive or negative
Positive work
What is the greek letter eta used to represent?
efficiency
This type of heat transfer can occur in a vacuum.
Radiation
U=Q-W
1st law of Thermo
Negative work is compression or expansion
compression
What symbol is used to represent internal energy?
U
The ability to conduct heat transfer
or
An oject to move heat energy from one part of itself to another part of itself.
Thermal conductivity
What is the term for when two things come into contact with each other heat will flow from the hotter object to the colder until the have the same temp.
Thermal equilibrium
What does adiabatic mean?
No energy transferred.
delta Q = 0