Which is an example of the first law of thermodynamics?
A)
Helium-filled balloons float in air while CO2 - filled balloons do not.
B)
A room is cooled when the air conditioner is switched on.
C)
Car tires expand more often in summer than in winter.
D)
The exterior surfaces of refrigerators sometimes get hot.


Entropy is the amount of disorder in a system. The third law of thermodynamics explains the conditions for attaining minimum entropy. Which fundamental process will get a system to this state?
A)
Cooling
B)
Heating
C)
Ionization
D)
Nuclear fusion

An example of the zeroth law of thermodynamics would be
A)
The efficiency of an engine can never reach 100%.
B)
All items in the freezer are at the same temperature as each other.
C)
A car converts chemical potential energy into heat and kinetic energy.
D)
It is impossible to reduce the temperature of a substance to absolute zero.
5)
The law of conservation of energy states that
A)
energy may be created, destroyed or transformed.
B)
energy may be created, but only in certain types of nuclear reactions.
C)
energy may neither be created nor destroyed; it may only be transformed.
D)
the energy created by one process must be equal to that destroyed by another process.