Multiple Choice
Which of the following is not a method of heat transfer?
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20. Heat and Temperature
Heat Transfer
Multiple Choice
Which of the following quantities is a measure of the rate of heat energy transfer?
A
Power, often represented as , measured in watts (W)
B
Thermal conductivity, represented as , measured in
C
Specific heat capacity, represented as , measured in
D
Temperature, represented as , measured in kelvin (K)
Verified step by step guidance1
Understand that the problem asks for the quantity that measures the rate of heat energy transfer, which means how quickly heat energy is being transferred per unit time.
Recall that power (P) is defined as the rate at which work is done or energy is transferred, and it is measured in watts (W), where 1 watt equals 1 joule per second.
Recognize that thermal conductivity (k) is a material property that indicates how well a material conducts heat, but it does not directly measure the rate of heat transfer itself; it has units of watts per meter per kelvin (\(W/m/K\)).
Note that specific heat capacity (c) is the amount of heat required to raise the temperature of a unit mass of a substance by one kelvin, measured in joules per kilogram per kelvin (\(J/kg/K\)), which relates to heat storage, not transfer rate.
Temperature (T) is a measure of the thermal state of a system in kelvin (K), but it does not quantify the rate of heat transfer.
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