Introduction to Thermodynamics

A system in which energy can cross the boundary but mass cannot is:

• a fixed system.

• an imaginary system.

• an open system.

• a closed system.

Properties whose values depend on the size/extent-of the system are:

• Intensive

• Extensive

Which of the following hardware would be considered a 'closed system'?

• A nozzle.

• A piston cylinder device.

• A turbine.

• A diffuser.

An isobaric process is one in which:

• volume remains constant.

• entropy remains constant.

• pressure remains constant.

• temperature remains constant.

A quasi-equilibrium process is a true representation of an actual process.

• True

• False

A thermodynamic cycle must:

• produce a work output.

• return the system to its initial state at the end of a set of processes.

• use the same working fluid throughout, i.e. no renewal of the fluid.

• not allow any transfer of mass across the system boundary.

An isochoric process is one in which:

• volume remains constant.

• entropy remains constant.

• pressure remains constant.

• temperature remains constant.

Internal energy is:

• The energy that a system possesses as a result of its motion.

• The energy that a system possesses as a result of its elevation in a gravitational field.

• The sum of microscopic forms of energy including sensible energy, latent energy, chemical energy and nuclear energy.

• The sum of all forms of the macroscopic energies.

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NGSS.HS-PS1-4

NGSS.HS-PS3-4

Heat is transferred as a result of a:

• pressure difference.

• body force.

• entropy difference.

• temperature difference.

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NGSS.HS-PS3-4

For a closed system, energy can be transferred across the boundary via heat and work transfer.

• True

• False

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NGSS.HS-PS3-4