Surroundings and Boundaries
1 / 10
A boundary that moves during expansion or compression is called:
Explanation: In piston-cylinder systems, the piston moves — making it a movable boundary.
2 / 10
In thermodynamics, boundaries are selected based on:
Explanation: Boundaries can be imagined based on how the system is defined in a given scenario.
3 / 10
The surroundings in a steam engine cycle would be:
 Explanation: Everything outside the system (e.g., steam engine), like the atmosphere, is considered surroundings.
4 / 10
A boundary that allows no interaction of any kind is:
Explanation: An isolated system has boundaries that prevent energy and matter exchange.
5 / 10
Which of the following boundaries allows heat transfer?
 Explanation: Diathermic boundaries allow heat exchange; adiabatic ones do not.
6 / 10
A boundary that allows energy but not matter to pass is:
 Explanation: Closed systems allow energy (like heat/work) to pass but not matter.
7 / 10
The system and surroundings together form the:
 Explanation: System + surroundings = Universe, in thermodynamic terms.
8 / 10
The interaction between the system and surroundings happens through the:
Explanation: All energy or matter exchange between system and surroundings occurs across the boundary.
9 / 10
 The boundary in a thermodynamic system:
Explanation: A boundary can be fixed/movable and real or imaginary depending on the problem.
10 / 10
 In thermodynamics, the area outside the system is called:
Explanation: Everything external to the system that can interact with it is called the surroundings.
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