THERMODYNAMIC & HEAT TRANSFER -
CHAPTER 3 EXAM QUESTIONS WITH
CORRECT ANSWERS
Heat - ANSWER-the form of energy that is transferred between two systems (or a
system and its surroundings) by virtue of a temperature difference
Conduction - ANSWER-transfer of energy from the more energetic particles of a
substance to the adjacent less energetic ones as a result of interaction between
particles
Convection - ANSWER-transfer of energy between a solid surface and the adjacent
fluid that is in motion, and it involves the combined effects of conduction and fluid
motion
Radiation - ANSWER-the transfer of energy due to the emission of electromagnetic
waves (or photons)
power (W) - ANSWER-work done per unit time
electrical work (We) - ANSWER-generalized force is the voltage (the electrical potential)
and the generalized displacement is the electrical charge
magnetic work - ANSWER-where the generalized force is the magnetic field strength
and the generalized displacement is the total magnetic dipole moment
electrical polarization work - ANSWER-where the generalized force is the electric field
strength and the generalized displacement is the polarization of the medium (the sum of
the electric dipole rotation moments of the molecules)
energy balance - ANSWER-The net change (increase or decrease) in the total energy
of the system during a process is equal to the difference between the total energy
entering and the total energy leaving the system during that process
Work Transfer (W) - ANSWER-energy interaction that is not caused by a temperature
difference between a system and its surroundings is work
Mass Flow (m) - ANSWER-Mass flow in and out of the system serves as an additional
mechanism of energy transfer. When mass enters a system, the energy of the system
increases because mass carries energy with it (in fact, mass is energy)
Total Energy (E) - ANSWER-the sum of the all of the different forms of energy
CHAPTER 3 EXAM QUESTIONS WITH
CORRECT ANSWERS
Heat - ANSWER-the form of energy that is transferred between two systems (or a
system and its surroundings) by virtue of a temperature difference
Conduction - ANSWER-transfer of energy from the more energetic particles of a
substance to the adjacent less energetic ones as a result of interaction between
particles
Convection - ANSWER-transfer of energy between a solid surface and the adjacent
fluid that is in motion, and it involves the combined effects of conduction and fluid
motion
Radiation - ANSWER-the transfer of energy due to the emission of electromagnetic
waves (or photons)
power (W) - ANSWER-work done per unit time
electrical work (We) - ANSWER-generalized force is the voltage (the electrical potential)
and the generalized displacement is the electrical charge
magnetic work - ANSWER-where the generalized force is the magnetic field strength
and the generalized displacement is the total magnetic dipole moment
electrical polarization work - ANSWER-where the generalized force is the electric field
strength and the generalized displacement is the polarization of the medium (the sum of
the electric dipole rotation moments of the molecules)
energy balance - ANSWER-The net change (increase or decrease) in the total energy
of the system during a process is equal to the difference between the total energy
entering and the total energy leaving the system during that process
Work Transfer (W) - ANSWER-energy interaction that is not caused by a temperature
difference between a system and its surroundings is work
Mass Flow (m) - ANSWER-Mass flow in and out of the system serves as an additional
mechanism of energy transfer. When mass enters a system, the energy of the system
increases because mass carries energy with it (in fact, mass is energy)
Total Energy (E) - ANSWER-the sum of the all of the different forms of energy
