rank the compounds below in order of increasing vapor pressure at 298 K?

Question

rank the compounds below in order of increasing vapor pressure at 298 K?

A) c3h6
B) c4h8
C) c5h10

Answer 1

To determine the order of increasing vapor pressure at 298 K for the given compounds, we need to consider their molecular weights and intermolecular forces. Generally, molecules with lower molecular weights and weaker intermolecular forces have higher vapor pressures.

Let's compare the compounds based on their molecular weights:

A) C3H6: Molecular weight = (3 * 12.01) + (6 * 1.01) = 42.08 g/mol
B) C4H8: Molecular weight = (4 * 12.01) + (8 * 1.01) = 56.11 g/mol
C) C5H10: Molecular weight = (5 * 12.01) + (10 * 1.01) = 70.14 g/mol

Based on molecular weight, the order from lowest to highest is:
A) C3H6
B) C4H8
C) C5H10

Now, let's consider the effect of intermolecular forces. Alkenes like C3H6, C4H8, and C5H10 have weak London dispersion forces, which arise due to the temporary fluctuations in electron distribution. As the molecular weight increases, the number of electrons increases, resulting in stronger London dispersion forces.

Therefore, the final order of increasing vapor pressure at 298 K is:
A) C3H6 (lowest vapor pressure)
B) C4H8
C) C5H10 (highest vapor pressure)

Answer 2

To rank the compounds in order of increasing vapor pressure at 298 K, we need to consider their molecular size and molecular weight. Generally, smaller and lighter molecules have higher vapor pressures because they have weaker intermolecular forces holding them together.

To determine the molecular weight of each compound, we should calculate the number of carbon and hydrogen atoms in each molecule.

A) C3H6: Contains 3 carbon (C) atoms and 6 hydrogen (H) atoms. Molecular weight = (3 x Atomic weight of C) + (6 x Atomic weight of H)

B) C4H8: Contains 4 carbon (C) atoms and 8 hydrogen (H) atoms. Molecular weight = (4 x Atomic weight of C) + (8 x Atomic weight of H)

C) C5H10: Contains 5 carbon (C) atoms and 10 hydrogen (H) atoms. Molecular weight = (5 x Atomic weight of C) + (10 x Atomic weight of H)

Now, compare the molecular weights of the compounds. The compound with the lowest molecular weight will have the highest vapor pressure, while the compound with the highest molecular weight will have the lowest vapor pressure.

Ranking the compounds in increasing order of vapor pressure:

1) C3H6
2) C4H8
3) C5H10

Answer 3

rank the compounds below in order of increasing vapor pressure at 298 K?

To determine the order of increasing vapor pressure at 298 K for the given compounds, we need to consider their molecular weights and intermolecular forces. Generally, molecules with lower molecular weights and weaker intermolecular forces have higher vapor pressures.

To rank the compounds in order of increasing vapor pressure at 298 K, we need to consider their molecular size and molecular weight. Generally, smaller and lighter molecules have higher vapor pressures because they have weaker intermolecular forces holding them together.

The longer the chain the more intermolecular forces and the higher the boiling point (lower vapor pressure).