Multiple Choice
Which of the following statements about a sample of gas containing molecules of different masses is true according to the kinetic molecular theory?
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7. Gases
Kinetic Molecular Theory
Multiple Choice
According to the kinetic molecular theory, what property do faster-moving molecules possess in greater amounts that causes them to move faster?
A
Electronegativity
B
Kinetic energy
C
Potential energy
D
Atomic radius
Verified step by step guidance1
Recall that according to the kinetic molecular theory, the speed of molecules is related to their energy of motion.
Understand that faster-moving molecules have greater amounts of kinetic energy, which is the energy associated with motion.
Recognize that kinetic energy is given by the formula \(E_k = \frac{1}{2} m v^2\), where \(m\) is the mass of the molecule and \(v\) is its velocity.
Note that as the velocity \(v\) increases, the kinetic energy \(E_k\) increases quadratically, meaning faster molecules have significantly more kinetic energy.
Conclude that the property possessed in greater amounts by faster-moving molecules is kinetic energy, not electronegativity, potential energy, or atomic radius.
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