CHEM 1335 SI FINAL QUIZ

The molecular geometry consists of _____.

a) a nonbonding pair of electrons

b) a single bond
c) a multiple bond

• a only

• b only

• c only

• b and c

When NaCl dissolves in water, aqueous Na+ and Cl- ions result. The force of attraction that exists
between Na+ and H2O is called a(n) ________ interaction.

• Hydrogen bonding

• dipole-dipole

• ion-dipole

• london dispersion force

The bond angles for the molecules are determined by their _______.

• molecular geometry.

• electron-pair geometry.

What are intramolecular forces?

• forces between atoms in a molecule

• forces between two or more molecules

What are the different types of intermolecular forces?

What is the order of strength of intermolecular forces?

• ion-dipole > dispersion forces > dipole-dipole > hydrogen-bonding

• ion-dipole > hydrogen-bonding > dipole-dipole > dispersion forces

• hydrogen-bonding > dipole-dipole > dispersion forces > ion-dipole

• dispersion forces > dipole-dipole > ion-dipole > hydrogen-bonding

Pair the right options:

• Most

  i) non-polar compound has dispersion forces

  ii) polar compounds have dipole-dipole and dispersion forces

• Most

  i) polar compound has dispersion forces

  ii) non-polar compounds have dipole-dipole and dispersion forces

The heat flows out of the system into the surroundings. It is a _________

• Endothermic reaction

• Exothermic reaction

If CH4(g) + 2 O2(g) --> CO2(g) + 2 H2O (g), Enthalpy(H) = 802 kJ

Then, CO2(g) + 2 H2O (g) --> CH4(g) + 2 O2(g), Enthalpy(H)=?

• 802kJ

• -802kJ

• 401kJ

• -401kJ

What is the formula for the amount of heat energy released or absorbed?