Assume a Heteronuclear Diatomic Molecule,AB,forms a One-Dimensional Crystal by Lining

question 108

Multiple Choice

Assume a heteronuclear diatomic molecule,AB,forms a one-dimensional crystal by lining up along the x-axis.Also assume that each molecule can only have one of six possible orientations,corresponding to atom A facing in either the positive or negative direction along the x-,y-,or z-axis.If the molecules are arranged randomly in the six directions,the molar entropy at absolute zero should be

• A)R ln 6.
• B)R ln 6⁶.
• C)R ln 6!
• D)0.

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