Periodic trends/
Bond Enthalpy
Bond Enthalpy
Which atom has the smallest radius?
Na, Cs, N, I
N
Trigonal planar
What shape does each hybridization have?
sp= linear, sp2= trigonal planar, sp3= tetrahedral
At what temperature will 0.654 moles of neon gas occupy 12.30 liters at 1.95 atm?
447 K
Arrange the intermolecular forces from weakest to strongest.
dispersion, dipole-dipole, hydrogen, ionic
Which atom has the largest ionization energy?
Al, S, K, Sr
S
What is the molecular geometry of NCl3?
Trigonal pyramidal
What is the hybridization of CO2?
sp
A 113L sample of helium at 27°C is cooled at constant pressure to -78.0°C. What is the new volume of the helium?
73 L
Which of the following compounds is capable of hydrogen bonding?
CH3OCH3, CH3CH2OH, HF, CH3OH, CH3F, Br2
CH3CH2OH, HF, CH3OH
Arrange the following from weakest to strongest in terms of bond length:
SH, TeH, OH, SeH, PoH
OH<SH<SeH<TeH<PoH
Draw and give the shape, angle, and if it is polar or not polar: CH2O
Trigonal planar, 120, polar
How many sigma and pi bonds are there in C2H4?
5 sigma, 1 pi
At 304 K, a 5.6 L container with H2 and N2 has a total pressure of 1.55 atm. If there are 0.034 moles of H2, what is the partial pressure of N2?
1.4 atm
Which has the highest boiling point?
CH3CH2CH2OH, CH3CH2OCH3, (CH3)3N
CH3CH2CH2OH
Arrange the following from smallest to largest electron affinity:
F, Mg, Ba, Ag, Br
Ba, Mg, Ag, Br, F
What is the formal charge of each atom in ICl4-?
I= -1, Cl= 0
What is the hybridization of each central atom in CH3CH2CH3?
sp3
A sample of argon gas at STP occupies 56.2 liters. What is the number of moles of argon and how many grams are in the sample?
2.51 mol, 100 g
Which of the following compounds is capable of dipole-dipole interactions?
CH4, SF6, CO2, NH4+, H2CO
H2CO
Calculate the bond enthalpy of the following reaction:
Bond enthalpies: H−H: 432, O=O: 496, H−O: 463
H2(g) + 1⁄2 O2(g) ---> H2O(g)
−246 kJ
Draw and give the shape, angle, and if it is polar or non polar: XeF4
Square planar, 90, non polar
How many sigma and pi bonds are there in...
34 sigma, 6 pi
96.0 g. of a gas occupies 48.0 L at 700.0 mm Hg and 20.0 °C. What is its molar mass?
52.2 g/mol
What intermolecular forces are present in the following molecules:
HCl, H2S, SiH4, CHCl3, NH3
HCl: dipole-dipole, H2S: dipole-dipole, SiH4: dispersion, CHCl3: dipole-dipole, NH3: hydrogen