THERMODYNAMICS AND HEAT
TRANSFER CHAPTER #2 EXAM
QUESTIONS WITH COMPLETE
ANSWERS
Forms of energy not stored in a system - ANSWER-*Dynamic* forms of energy or
*energy interactions*
Mechanical Energy - ANSWER-The form of energy that can be converted to mechanical
work completely and directly by an ideal mechanical device such as a turbine.
Heat - ANSWER-The form of energy that is transferred between two systems (or a
system and its surroundings), driven by a temperature difference
Adiabatic Process - ANSWER-When a system exchanges no heat with its surroundings.
Occurs only if a system is perfectly insulated
Forms of Heat Transfer - ANSWER-Conduction, Convection, Radiation
Conduction - ANSWER-Transfer of energy from more energetic particles of a substance
to the adjacent less energetic particles as a result of interaction/contact. I.e. the form of
heat transfer between two touching elements
Convection - ANSWER-Transfer of energy between a solid surface and the adjacent
fluid in motion, involving the combined effects of conduction and fluid motion (advection)
Radiation - ANSWER-The transfer of energy due to the emission of electromagnetic
waves (photons)
Work - ANSWER-The form of energy transfer associated with a force acting through a
distance, such as a rising piston, a rotating shaft, and an electric wire crossing the
system boundaries
Two requirements for a work interaction - ANSWER-1) There must be a force acting on
the boundary
2) The boundary must move
Two forms of mechanical work - ANSWER-Shaft work and spring work
Non-mechanical forms of work - ANSWER-Electric work, magnetic work, and electrical
polarization work
TRANSFER CHAPTER #2 EXAM
QUESTIONS WITH COMPLETE
ANSWERS
Forms of energy not stored in a system - ANSWER-*Dynamic* forms of energy or
*energy interactions*
Mechanical Energy - ANSWER-The form of energy that can be converted to mechanical
work completely and directly by an ideal mechanical device such as a turbine.
Heat - ANSWER-The form of energy that is transferred between two systems (or a
system and its surroundings), driven by a temperature difference
Adiabatic Process - ANSWER-When a system exchanges no heat with its surroundings.
Occurs only if a system is perfectly insulated
Forms of Heat Transfer - ANSWER-Conduction, Convection, Radiation
Conduction - ANSWER-Transfer of energy from more energetic particles of a substance
to the adjacent less energetic particles as a result of interaction/contact. I.e. the form of
heat transfer between two touching elements
Convection - ANSWER-Transfer of energy between a solid surface and the adjacent
fluid in motion, involving the combined effects of conduction and fluid motion (advection)
Radiation - ANSWER-The transfer of energy due to the emission of electromagnetic
waves (photons)
Work - ANSWER-The form of energy transfer associated with a force acting through a
distance, such as a rising piston, a rotating shaft, and an electric wire crossing the
system boundaries
Two requirements for a work interaction - ANSWER-1) There must be a force acting on
the boundary
2) The boundary must move
Two forms of mechanical work - ANSWER-Shaft work and spring work
Non-mechanical forms of work - ANSWER-Electric work, magnetic work, and electrical
polarization work
