The three molecules,  CH3Br, CH3Cl, and CH3F, have tetrahedral structures and are polar so they have both the London dispersion and the dipole-dipole forces between their molecules. Rank the three molecules in order of increasing boiling point, assuming that dipole-dipole forces are the predominant intermolecular force existing between their molecules.

Predict which of the following liquids has greater surface tension: acetone (CH3COCH3) or cyclopropanol (C₂H5OH). Note: Consider drawing the Lewis Structures for each molecule to determine the intermolecular forces. Molecule 1 Acetone Molecule 2 Cyclopropanol Strongest Intermolecular Force Molecule 1 Exhibits (Choose one) Strongest Intermolecular Force Molecule 2 Exhibits ▼ (Choose one) Name of Molecule with Greater Surface Tension

Consider the following experimental boiling points: CH4: -162°C C3Hg: -42°C C6H14: 69°C C9H20: 151°C Which of the following statements is correct for this set of compounds and supported by the data given? Select as many as applicable Select one or more: The molecule with the strongest intermolecular forces is C9H20 The C-C bond is the strongest covalent bond among the four molecules The dominant effect behind this trend is the strength of dipole/dipole forces OCH4 is the most polarizable molecule of the four C9H₂0 is the most polarizable molecule of the four The dominant effect behind this trend is the strength of dispersion forces

Calculate the heat required to convert 10.0 g of water at 100°C to steam at 100.0 °C. The specific heat of water is 1.00 cal/(g x °C); the heat of fusion is 80.0 cal/g; and the heat of vaporization is 540.0 cal/g.

The statements in the following multiple choices deal with various aspects of the relationship between vapor pressure and intermolecular forces. Choose the statement which is false. a) Volume has no effect on the vapor pressure of water. b) At a given temperature liquid HCl has higher vapor pressure than liquid HF. c) CHBr3 is less volatile than CHCl3. d) At a given temperature solid SF6 has higher vapor pressure than solid I2. e) The average kinetic energy of boiling water molecules is the same on a mountaintop as it is at sea level.

Which of these pure substances has only dispersion forces present between molecules? O H2 O HCI O NH3 o H20

Rank the three types of intermolecular forces by increasing strength. (#1 being the STRONGEST and #3 being the WEAKEST)

O London-dispersion forces and hydrogen bonding Question 9 Which intermolecular forces are present in a pure sample of the compound below? NH₂ O hydrogen bonding, dipole-dipole, and London-dispersion forces O dipole-dipole and London-dispersion forces O London-dispersion forces only O London-dispersion and dipole-dipole forces Question 10 Based on your answers to Questions 7, 8, and 9, which ranks these three compounds in order of increasing water solubility?