Ramsay Test Thermodynamics 3

Question 1

The second law of thermodynamics states that the entropy of an isolated system tends to do what?

Accepted Answer

Increase

Answer

Total entropy of an isolated system always increases over time in real processes.

Question 2

In a refrigeration cycle, what does the evaporator do?

Accepted Answer

Absorbs heat from the cooled space

Answer

The evaporator absorbs heat from the interior as the refrigerant evaporates.

Question 3

What property describes a material's resistance to heat flow?

Accepted Answer

Thermal resistance

Answer

Thermal resistance (R-value) measures how well a material resists heat transfer.

Question 4

When a gas is compressed quickly with no heat exchange, the process is called what?

Accepted Answer

Adiabatic

Answer

An adiabatic process occurs with no heat transfer to or from the system.

Question 5

What is the SI unit of heat energy?

Accepted Answer

Joule

Answer

The joule is the SI unit for energy, including heat.

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