Heat Transfer Flashcards
Which method of heat transfer does not involve particles?
Radiation
Which states of matter are fluids?
Gases and Liquids
What method of heat transfer occurs when particles with a lot of energy take the place of those with less?
Convection
What surfaces best absorb infrared radiation?
Black and Dull
What surfaces best emit infrared radiation?
Black and Dull
What method of heat transfer can occur in a vacuum?
Radiation
What method of heat transfer explains why hot air balloons rise?
Convection
Why it is best to wear bright white clothes on a hot day?
Because light, shiny surfaces are poor absorbers and poor emitters of radiation as they reflect the heat and reduce absorption of the heat energy
What is radiation?
Radiation is the transfer of heat energy by electromagnetic radiation
What is conduction?
Conduction is the transfer of heat energy when particles collide and transfer their energy.
In conduction how do they pass on their kinetic energy?
The vibrating atoms bump into neighbouring atoms and so that passes on their kinetic energy
What transfer of heat takes place in solids, liquids and gases but mainly in solids?
Conduction takes place in solids, liquids and gases, but works best in solids as their atoms/molecules are located closer together
What is convection?
Convection is a process that takes place in fluids. It changes form density causing it to rise and sink
True or False?
“For liquid to turn into a gas the particles need more energy, than when they are a liquid”
True
Does the temperature of the remaining liquid in evaporation lower?
Yes - Because the energy is taken from the reaming liquid
