UNE CHEM 1011 General Chemistry II Midterm Fall Questions With Verified & Complete Solutions 2023

UNE CHEM 1011 General Chemistry II Midterm Fall Questions With Verified & Complete Solutions 2023 Intermolecular forces Correct Answer: the various forces of attraction that may exist between the atoms and molecules of a substance due to electrostatic phenomena Kinetic energies Correct Answer: the energy required to overcome the attractive forces and thus increase the distance between particles Intramolecular forces Correct Answer: within the molecule that keep the molecule together Intermolecular forces Correct Answer: attractions between molecules, which determine many of the physical properties of a substance. Van der Waals forces Correct Answer: all of the attractive forces between neutral atoms and molecules The London dispersion force Correct Answer: one of three van der Waals forces is present in all condensed phases, known as "dispersion force". Electrons of an atom or molecule are in constant motion. Instantaneous dipole Correct Answer: if its electrons are distributed asymmetrically Induced dipole Correct Answer: distort the electrons of a neighboring atom or molecule Dispersion forces trend Correct Answer: Larger and heavier atoms and molecules exhibit stronger dispersion forces than do smaller and lighter atoms and molecules. Halogen molar mass, atomic radius, melting point, and boiling point trend Correct Answer: from the top of the group of halogens to the bottom all of the molar mass, atomic radius, melting point, and boiling point will be increasing. Reason behind molar mass, atomic radius, melting point, and boiling point trend Correct Answer: Valence electrons farther away from the nucleus are stronger in terms of molar mass, atomic radius, melting point, and boiling point trend Polarizability Correct Answer: The measure of how easy or difficult it is for another electrostatic charge (for example, a nearby ion or polar molecule) to distort a molecule's charge distribution (its electron cloud) is... Hydrogen bonding Correct Answer: Molecules with F-H, O-H, or N-H Viscosity Correct Answer: measure of its resistance to flow Factors of viscosity Correct Answer: imfs between the molecules of a liquid, the size and shape of the molecules, and the temperature Viscosity of the liquid decreases. Correct Answer: As the temperature increases, the molecules move more rapidly and their kinetic energies are better able to