Thermodynamics unit 1 (Heat Transfer)
Exam Questions with Verified Answers
Thermal energy - ANSWER-Internal energy of a thermodynamic system that results in
the system's temperature.
Macroscopic - ANSWER-Measurable and observed with the naked eye
Microscopic - ANSWER-Samples and objects that cannot be seen with the unaided eye.
Temperature - ANSWER-Physical property of matter that expresses hotness and
coldness, measure of the average kinetic energy of the particles in a sample.
Heat Reservoir - ANSWER-A system whose heat capacity is so large that is remains at
a constant temperature when it is in contact with another system.
Conduction - ANSWER-The flow of thermal energy directly through a material without
motion of the material itself. movement of heat by touch, solids.
Radiation - ANSWER-Electromagnetic waves that carry energy. Heat transfer by
electromagnetic waves.
Convection - ANSWER-Heat transfer through a gas or liquid caused by movement of
the fluid.
Latent Heat - ANSWER-The energy per unit made that is transferred during a phase
change of a substance.
Phase Change - ANSWER-The physical change of a substance f on one state (solid,
liquid, or gas) to another at constant temperature and pressure.
Entropy - ANSWER-Measure of disorder in a system; ratio of heat added to
temperature.
Thermal expansion - ANSWER-The increase in the length or volume of a material due
to a change in its temperature change.
Absolute temperature - ANSWER-Kelvin scale, a scale in which the hypothetical lowest
limit of physical temperature is assigned a value of zero.
Heat Engine - ANSWER-A device that converts heat energy into mechanical energy to
do work.
Order and Disorder - ANSWER-Structured vs chaos
Exam Questions with Verified Answers
Thermal energy - ANSWER-Internal energy of a thermodynamic system that results in
the system's temperature.
Macroscopic - ANSWER-Measurable and observed with the naked eye
Microscopic - ANSWER-Samples and objects that cannot be seen with the unaided eye.
Temperature - ANSWER-Physical property of matter that expresses hotness and
coldness, measure of the average kinetic energy of the particles in a sample.
Heat Reservoir - ANSWER-A system whose heat capacity is so large that is remains at
a constant temperature when it is in contact with another system.
Conduction - ANSWER-The flow of thermal energy directly through a material without
motion of the material itself. movement of heat by touch, solids.
Radiation - ANSWER-Electromagnetic waves that carry energy. Heat transfer by
electromagnetic waves.
Convection - ANSWER-Heat transfer through a gas or liquid caused by movement of
the fluid.
Latent Heat - ANSWER-The energy per unit made that is transferred during a phase
change of a substance.
Phase Change - ANSWER-The physical change of a substance f on one state (solid,
liquid, or gas) to another at constant temperature and pressure.
Entropy - ANSWER-Measure of disorder in a system; ratio of heat added to
temperature.
Thermal expansion - ANSWER-The increase in the length or volume of a material due
to a change in its temperature change.
Absolute temperature - ANSWER-Kelvin scale, a scale in which the hypothetical lowest
limit of physical temperature is assigned a value of zero.
Heat Engine - ANSWER-A device that converts heat energy into mechanical energy to
do work.
Order and Disorder - ANSWER-Structured vs chaos
