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The vapor pressure of C\(_7\)H\(_{16}\) is 124 torr at 320 K. The vapor pressure of C\(_6\)H\(_{14}\) at 320 K:

A. is smaller than 124 torr,
B. is equal to 124 torr,
C. could be smaller than, equal to, or larger than 124 torr,
D. is larger than 124 torr.

Answer :

The vapor pressure of C₆H₁₄ at 320 K could be smaller than, equal to, or larger than 124 torr.

The vapor pressure of a substance depends on its molecular structure, intermolecular forces, and temperature. Given that the vapor pressure of C₇H₁₆ is 124 torr at 320 K, we cannot determine the exact vapor pressure of C₆H₁₄ at the same temperature without additional information.

C₆H₁₄ and C₇H₁₆ have similar molecular structures, both being alkanes. However, the number of carbon atoms differs by one, which can influence intermolecular forces and vapor pressure. Generally, as the molecular weight increases, so does the vapor pressure. This suggests that C₆H₁₄ could potentially have a lower vapor pressure than C₇H₁₆ at 320 K. However, without specific data on the molecular interactions and intermolecular forces, we cannot definitively determine whether the vapor pressure of C₆H₁₄ at 320 K is smaller, equal to, or larger than 124 torr.

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