Unit 12 Flashcards
(13 cards)
Hydrogen bonds can form between hydrogen and any non-metal.
False, they can only form between hydrogen atoms and electronegative elements
The surface tension of water decreases when a detergent is added to it.
True, a detergent is soluble in water. It disrupts the hydrogen bonds of water molecules. This decreases the surface tension of water as new bonds are created between the molecules of the detergent and the molecules of water.
The meniscus in a test tube of water demonstrates the equal effect intermolecular forces have on all particles in a liquid.
False, the meniscus in a test tube of water demonstrates the unequal effect intermolecular forces have on all particles in a liquid due to the concave shape of a meniscus.
Molecular solids are good conductors of heat and electricity because the molecules are held together by ionic bonds.
False, Molecular solids are poor conductors of heat and electricity because the molecules are held together by dispersion forces, dipole-dipole forces, or hydrogen bonds.
What’s an elastic collision?
An elastic collision is one where two colliding particles don’t lose their kinetic energy. Energy may be transferred, but won’t be gained or lost.
__ atm = ____ kPa = ___ psi = ___ mm Hg = ___ torr
1 atm = 101.3 kPa =14.7 psi = 760 mm Hg = 760 torr
Of the forces listed, which is strongest? covalent dipole-dipole dispersion hydrogen
Covalent, bc Intramolecular are stronger than intermolecular.
Viscosity
the quantity that describes a fluid’s resistance to flow.
What instrument is normally used to measure atmospheric pressure?
Barometer
Pascal
SI unit of pressure
Standard conditions when working with gases are defined as \_\_\_\_. 0 K and 101.3 kPa 0 K and 1 kPa 0*C and 101.3 kPa 0*C and 1 kPa
C. 0 C and 101.3 kPa
What 2 things determine particle energy?
Mass and velocity
Why is hydrogen bonding only possible with hydrogen?
Hydrogen’s nucleus is electron deficient when it bonds with an electronegative atom.
