12 Questions
What is the SI unit of temperature?
Kelvin
What is the definition of enthalpy?
The heat required to cause a complete conversion between two phases at a constant temperature
What type of system is characterized by an exchange of energy but not mass?
Closed system
What is the name of the coil on the back of most refrigerators through which the refrigerant flows?
Condenser
What does the term NTP stand for?
Normal temperature and pressure
What is the term for a substance whose temperature is less than its saturation temperature?
Sub-cooled liquid
What is the primary distinction between an open system and a closed system?
Exchange of mass
Which of the following is a characteristic of a sub-cooled liquid?
Its temperature is less than its saturation temperature
What is the significance of Avogadro's hypothesis in thermodynamics?
It states that the molecular weights of all gases occupy the same volume
What is the primary focus of the science of thermodynamics?
Energy storage, transfer, and utilization
Which of the following coils is not typically found in a refrigeration system?
Superheater
What is the significance of the term NTP in thermodynamics?
It refers to the normal temperature and pressure of a system
Study Notes
SI Unit of Temperature
- The SI unit of temperature is Kelvin.
Enthalpy Definition
- Enthalpy is the heat required to cause a complete conversion between two phases at a constant temperature.
System Classification
- An open system is one in which there might be an exchange in energy but not mass.
- A closed system is one in which there might be an exchange in energy and mass.
- An isolated system is one in which there is no exchange in energy or mass.
Refrigerator Coil
- The coil on the back of most refrigerators is called the condenser.
NTP Meaning
- NTP stands for Normal Temperature and Pressure.
Gas Laws
- Avogadro's hypothesis states that molecular weights of all gases occupy the same volume.
Substance Classification
- A sub-cooled liquid is a substance whose temperature is less than its saturation temperature.
- A saturated vapor is a substance whose temperature is equal to its saturation temperature.
- A superheated vapor is a substance whose temperature is greater than its saturation temperature.
Thermodynamics Scope
- Thermodynamics is a science that includes the study of energy storage, energy transfer, and energy utilization, but not energy transformation.
Test your knowledge of thermodynamics with these questions on temperature, enthalpy, and systems. Check your understanding of the fundamental concepts in physics!
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