Thermodynamics Flashcards
7 cards from real Ramsay Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Thermodynamics flashcards as text
The second law of thermodynamics states that the entropy of an isolated system tends to do what?
Answer: Increase
Total entropy of an isolated system always increases over time in real processes.
In a refrigeration cycle, what does the evaporator do?
Answer: Absorbs heat from the cooled space
The evaporator absorbs heat from the interior as the refrigerant evaporates.
What property describes a material's resistance to heat flow?
Answer: Thermal resistance
Thermal resistance (R-value) measures how well a material resists heat transfer.
When a gas is compressed quickly with no heat exchange, the process is called what?
Answer: Adiabatic
An adiabatic process occurs with no heat transfer to or from the system.
What is the SI unit of heat energy?
Answer: Joule
The joule is the SI unit for energy, including heat.
Hot air rising and cool air sinking in a room is an example of what heat transfer mode?
Answer: Convection
Convection moves heat through the bulk motion of a fluid such as air.
What is specific heat capacity a measure of?
Answer: Energy to raise one unit mass by one degree
Specific heat capacity is the energy needed to raise one kilogram by one degree.