PHYSICS: ThermodynamicsAP, AP Physics 2 –
Thermodynamics Questions And Answers 2025/2026
Thermodynamics - CORRECT ANSWER-Flow of energy in the universe, as the flow
relates to work, heat, entropy, and the different forms of energy
Zeroth law of thermodynamics - CORRECT ANSWER-Objects are in thermal
equilibrium when they are at the same temperature, transitive property in
thermal systems (a=b, b=c, a=c)
Temperature - CORRECT ANSWER-A physical property of matter that relates the
average kinetic energy of the particles in a substance
Heat - CORRECT ANSWER-The transfer of thermal energy from a hotter
object(higher temp/energy) to a colder object (lower temp/energy)
Thermal equilibrium - CORRECT ANSWER-No heat flows between two objects in
thermal contact
Fahrenheit to Celsius equation - CORRECT ANSWER-
Kelvin to Celsius equation - CORRECT ANSWER-
, Thermal expansion - CORRECT ANSWER-delta L= change in length
alpha= coefficient of linear expansion
L= original length
delta T= change in temperature
Isolated systems - CORRECT ANSWER-System not capable of exchanging energy or
matter with their surrounding; total change in internal energy is zero
e.g. bomb calorimeter
Closed systems - CORRECT ANSWER-System capable of exchanging energy, but not
matter, with the surrounding
e.g. gas in vessels with movable pistons
Open systems - CORRECT ANSWER-Systems can exchange both matter and energy
with the environment
e.g. Boiling pot of water
State functions - CORRECT ANSWER-Thermodynamic properties that are a
function of only the current equilibrium state of a system
e.g. pressure, density, temperature, volume, enthalpy, internal energy, Gibbs free
energy, entropy
First law of thermodynamics - CORRECT ANSWER-The change in the total internal
energy of a system is equal to the amount of energy transferred in the form of
heat to the system, minus the amount of energy transferred from the system in
the form of work
Thermodynamics Questions And Answers 2025/2026
Thermodynamics - CORRECT ANSWER-Flow of energy in the universe, as the flow
relates to work, heat, entropy, and the different forms of energy
Zeroth law of thermodynamics - CORRECT ANSWER-Objects are in thermal
equilibrium when they are at the same temperature, transitive property in
thermal systems (a=b, b=c, a=c)
Temperature - CORRECT ANSWER-A physical property of matter that relates the
average kinetic energy of the particles in a substance
Heat - CORRECT ANSWER-The transfer of thermal energy from a hotter
object(higher temp/energy) to a colder object (lower temp/energy)
Thermal equilibrium - CORRECT ANSWER-No heat flows between two objects in
thermal contact
Fahrenheit to Celsius equation - CORRECT ANSWER-
Kelvin to Celsius equation - CORRECT ANSWER-
, Thermal expansion - CORRECT ANSWER-delta L= change in length
alpha= coefficient of linear expansion
L= original length
delta T= change in temperature
Isolated systems - CORRECT ANSWER-System not capable of exchanging energy or
matter with their surrounding; total change in internal energy is zero
e.g. bomb calorimeter
Closed systems - CORRECT ANSWER-System capable of exchanging energy, but not
matter, with the surrounding
e.g. gas in vessels with movable pistons
Open systems - CORRECT ANSWER-Systems can exchange both matter and energy
with the environment
e.g. Boiling pot of water
State functions - CORRECT ANSWER-Thermodynamic properties that are a
function of only the current equilibrium state of a system
e.g. pressure, density, temperature, volume, enthalpy, internal energy, Gibbs free
energy, entropy
First law of thermodynamics - CORRECT ANSWER-The change in the total internal
energy of a system is equal to the amount of energy transferred in the form of
heat to the system, minus the amount of energy transferred from the system in
the form of work
