Solids generally expand as the temperature increases. Such an expansion results
ID: 973829 • Letter: S
Question
Solids generally expand as the temperature increases. Such an expansion results from an increase in the bond length between adjacent atoms as the vibrational amplitude increases. Which of the following statements is true?
Thermal expansion is consistent with a harmonic potential between adjacent atoms.
Thermal expansion is consistent with an anharmonic potential between adjacent atoms.
Thermal expansion is consistent with both harmonic and anharmonic potentials between adjacent atoms.
A possible explanation for the contraction of some solids with increasing temperature is the occurrence of a phase transition.
Solids generally expand as the temperature increases. Such an expansion results from an increase in the bond length between adjacent atoms as the vibrational amplitude increases. Which of the following statements is true?
Thermal expansion is consistent with a harmonic potential between adjacent atoms.
Thermal expansion is consistent with an anharmonic potential between adjacent atoms.
Thermal expansion is consistent with both harmonic and anharmonic potentials between adjacent atoms.
A possible explanation for the contraction of some solids with increasing temperature is the occurrence of a phase transition.
A only C and D B and D B onlyExplanation / Answer
True statements are:
Thermal expansion is consistent with both harmonic and anharmonic potentials between adjacent atoms.
A possible explanation for the contraction of some solids with increasing temperature is the occurrence of a phase transition.
So, answer is C and D.
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