A: a closed system
B: an open system
C: an isolated system
D: a homogeneous system
举一反三
- Which of the following descriptions is correct? A: The microscopic viewpoint studies the large-scale properties of matter (temperature, pressure, volume, etc.). B: The part of the universe under study in thermodynamics is called the system; the parts of the universe that can interact with the system are called surroundings. C: For an open system, only matter can be transferred between system and surroundings. D: A closed system must be an isolated system, but an isolated system may not be a closed system.
- 中国大学MOOC: A closed system must be an isolated system.
- The continental divide in North America, separating the system of the Atlantic and the system of the Pacific, is( )
- Walking on a crowded sidewalk is an example of which system () A: Closed B: Open
- In a constant pressure process for a closed system, the enthalpy change of the system depends on the heat exchanged.
内容
- 0
In the closed cooling system， the water （）.
- 1
The expansion tank for a diesel engine closed cooling system is designed to maintain a constant head on the system and （）.
- 2
In a constant volume process for a closed system, the internal energy change of the system depends on the heat exchanged.
- 3
A control volume is: （ ） A: An isolated system B: A closed system but heat and work can cross the boundary C: A specific amount of mass in space D: A fixed region in space where mass, heat and work can cross the boundary of that region
- 4
Two systems of weights and measures used in the U.S. are ______. A: the U. S. Customary System and the metric system B: the International System and the metric system C: the Imperial System and the metric system D: the Customary System and the Imperial system