Thermochemistry
Type of reaction in which the products have more energy than the reactants.
What is endothermic?
Electron energy level transition releasing the greatest amount of energy:
a) n=1 to n=6
b) n=4 to n=1
c) n=3 to n=1
What is n=4 to n=1?
Number of double bonds in the molecule CO32-.
What is 1 double bond?
Polar or non-polar: CH4
What is non-polar?
Type of intermolecular force between polar molecules.
What are dipole-dipole interactions?
Number of phase changes experienced by 10.0g of H2O when it cools from a temperature of 104°C to 1°C.
What is one phase change (gas to liquid)?
Wavelength of light with a frequency of 2.52*1016 min-1.
What is 714nm?
Ranking of atom size from smallest to largest from the following elements:
Sr, Fe, S, Fr, Ge
What is S, Ge, Fe, Sr, Fr?
Polar or non-polar: SCl2
What is polar?
Intermolecular forces between water molecules.
What are hydrogen bonds?
Quantity of heat absorbed, in joules, by 15.0g of copper that is heated from 16.1°C to 49.3°C. Specific heat of copper is 24.5 J/mol°C. Molar mass of copper is 63.55 g/mol.
What is 192 J?
Energy, in joules, of one photon with a frequency of 4.57*1014 Hz.
What is 3.03*10-19 J?
Electronegativity increases on the periodic table moving in this direction.
What is up and to the right?
Polar molecule from the following examples:
XeF4
SF6
BrF5
PF5
Strongest type of intermolecular force.
What is ion-ion interaction?
Heat absorbed, in kJ, when 12.6g of H2O vapor is decomposed to its elements.
2H2O(g) --> 2H2(g) + O2(g)
Change in enthalpy for this exact reaction is 484 kJ.
What is 169 kJ?
Invalid set of quantum numbers from the following list:
(3, 1, -1, +1/2)
(2, 1, 0, -1/2)
(4, 3, 2, -1/2)
(2, 2, -1, -1/2)
What is (2, 2, -1, -1/2)?
Molecule with only one lone pair around the central atom from the following examples:
CH3Br
H2O
NH3
XeF2
What is NH3?
The electronic and molecular geometry of SCl4 (sulfur tetrachloride).
What is trigonal bipyramidal (electronic) and seesaw (molecular)?
Hybridization of Boron in BH3.
What is sp2?
Final temperature reached when a 45g silver spoon at 25°C (specific heat 0.24 J/g°C) is submerged in a cup with 180g of coffee at 95°C (specific heat 4.184 J/g°C).
What is 94°C?
Light with the lower frequency from the following options:
a) radio waves from an AM radio station broadcasting 1030kHz
b) red light (λ = 633 nm) from a helium-neon laser
What is (a), radio waves at 1030kHz?
Group on the periodic table with the lowest bonding capacity.
What are the noble gases (group 18)?
Electronic and molecular geometry of the molecule BrF5.
What is octahedral (electronic) and square pyramidal (molecular)?
Hybridization of a central atom with a steric number of 5.
What is sp3d?