Multiple Choice
Which physical change causes the pointer of a dial thermometer to move when measuring temperature?
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1. Intro to General Chemistry
Temperature
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Which phrase correctly describes temperature?
A
A measure of the potential energy stored in chemical bonds.
B
The amount of heat required to raise the temperature of a substance by one degree.
C
The total energy contained within a substance.
D
A measure of the average kinetic energy of the particles in a substance.
Verified step by step guidance1
Understand that temperature is a physical quantity that relates to the motion of particles in a substance.
Recall that temperature is not about the total energy or potential energy stored in chemical bonds, but rather about the energy associated with particle movement.
Recognize that the average kinetic energy of particles (atoms or molecules) in a substance determines its temperature.
Differentiate temperature from heat: heat is energy transfer due to temperature difference, while temperature measures the average kinetic energy of particles.
Conclude that the correct phrase describing temperature is: 'A measure of the average kinetic energy of the particles in a substance.'
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