High School

The vapor pressure of [tex]C_7H_{16}[/tex] is 124 torr at 320 K. The vapor pressure of [tex]C_6H_{14}[/tex] at 320 K:

1. is larger than 124 torr
2. could be smaller than, equal to, or larger than 124 torr
3. is equal to 124 torr

Answer :

Given that the vapor pressure of C7H16 is 124 torr at 320 K, the vapor pressure of C6H14 (hexane) at the same temperature could be smaller, equal to, or larger than 124 torr, depending on factors such as molecular weight, intermolecular forces, and molecular interactions. Therefore, a definitive conclusion cannot be drawn without more specific data or calculations. The correct answer is none of the options.

The vapor pressure of a substance depends on its molecular properties, such as molecular weight, intermolecular forces, and temperature.

In this case, we are given that the vapor pressure of C7H16 (heptane) is 124 torr at 320 K.

To determine the vapor pressure of C6H14 (hexane) at the same temperature, we can make some assumptions.

Since hexane has a lower molecular weight compared to heptane, it typically exhibits weaker intermolecular forces.

Generally, substances with weaker intermolecular forces have higher vapor pressures. This suggests that hexane should have a vapor pressure greater than 124 torr at 320 K.

However, it's important to note that other factors, such as the specific molecular interactions and structural features, can also influence the vapor pressure.

Therefore, we cannot definitively conclude that the vapor pressure of hexane is larger than 124 torr. It is plausible that hexane could have a vapor pressure smaller than, equal to, or larger than 124 torr at 320 K.

The exact value would require more specific data or calculations based on the molecular properties of hexane.

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