Propiedades y Estados Físicos Propiedades de Liquidos: Fuerzas intermoleculares, cohesión, adhesión y viscosidad por Rachel Bernstein, Ph.D., Anthony Carpi, Ph.D. Lectura Prueba Enseñe con esto 1. Lipids flow because the intermolecular forces between molecules are weak enough to allow the molecules to move around. the intramolecular forces between molecules are weak enough to allow the molecules to move around. the intermolecular forces between molecules are weak enough to allow atoms to form different types of molecules. the intramolecular forces are weak enough to allow atoms to form different types of molecules. 2. Which of the following do liquids and gases have in common? Both liquids and gases have the ability to flow. Neither liquids nor gases have a fixed shape. Both liquids and gases have weaker intermolecular forces than solids. All of the answers are correct. 3. Most substances can move from one phase to another when the temperature changes. true false 4. Water changes from liquid to gas when heated to the boiling point because the heat changes the chemical composition of each water molecule. the kinetic energy increases to the point that it eventually overcomes the intermolecular forces. the kinetic energy increases to the point that it eventually overcomes the intramolecular forces. the kinetic energy decreases, causing the molecules to spread out. 5. Evenly distributed electron sharing makes molecules more attractive to their neighbors. true false 6. London dispersion forces form only between polar molecules. form only between nonpolar molecules. can form between any molecules. are stronger among smaller molecules. 7. Dipole-induced dipole interactions are generally stronger than dipole-dipole interactions. are not considered a van der Waals force. occur when a polar molecule stimulates the electrons in a nonpolar molecule to move so they’re no longer evenly distributed. occur when the electrons in a polar molecule shift become evenly distributed. 8. Which of the following does NOT result from the strong hydrogen bonds in water molecules? Water droplets have a spherical shape. A leaf will float on the surface of water rather than sink. Water molecules interact more strongly with each other than with other compounds. Water pours more quickly than motor oil. 9. Which statement is true about the viscosity of a liquid? The stronger the intermolecular forces, the more viscous the liquid. The smaller the molecules, the more viscous the liquid. The higher the temperature, the more viscous the liquid. All of the answers are true. 10. If a nonpolar substance dissolves easily into an unknown liquid, the liquid solvent is most likely water. polar. nonpolar. Any of the choices since all solvents dissolve in all solutes. Resultados de Prueba
