The molecular weight are equal, and therefore the London forces Are the same How

Question

The molecular weight are equal, and therefore the London forces Are the same However, there will be strong hydrogen bonding in ethane dimethyl ether. You expect ethanol to have the lower vapor pressure. of vapor pressure at 20 degree C are: CH_3, OCH_3, 4.88 atm; CH_3CH_2 Arrange the following hydrocarbons in order of increasing vapor pressure: ethane, C_2H_6; propane, C_3H_8; and butane, C_4H_10. Explain your answer. At the same temperature, methyl chloride, CH_3Cl, has a vapor pressure of 1490 mmHg, and ethane as a vapor pressure of 42 mmHg.

Explanation / Answer

11.6) higher the vapour pressure lower the boiling point.

larger the mass larger the intermolecular forces

larger the intermolecular forces higher the boiling point.

higher the boiling point lower the vapour pressure.

C4H10 < C3H8 < C2H6 order of vapour pressure.

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