Prince George Community College » Chemistry » Chem 1010 - General Chemistry 1 » Summer 2021

Question #1

The observation that ethanol (C2H5OH) has a higher vapor pressure than water (H2O) at the same temperature is due to more

A. London forces in the water

B. London forces in the ethanol

C. hydrogen bonding in the water

D. kinetic energy in the ethanol

Question #2

Which group includes only exothermic processes?

A. freezing, vaporization, deposition

B. freezing, condensation, deposition

C. melting, condensation, deposition

D. melting, condensation, sublimation

Question #3

Boiling a liquid means

A. the vapor pressure of the liquid is less than the external pressure above the liquid surface.

B. the vapor pressure of the liquid equals the external pressure above the liquid surface.

C. a dynamic equilibrium exists between the liquid and vapor phase.

D. the molecular bonds in the liquid are broken rapidly.

Question #4

Which statement about vaporization enthalpy and condensation enthalpy is correct?

A. The vaporization enthalpy is exactly equal to the condensation enthalpy.

B. The vaporization enthalpy is always less than the condensation enthalpy.

C. There is no general relationship between these two quantities and the values depend on the substance involved.

D. The condensation enthalpy is equal in magnitude but opposite in sign when compared to the vaporization enthalpy

Question #5

Which group includes only endothermic processes?

A. freezing, vaporization, deposition

B. melting, evaporation, sublimation

C. melting, condensation, sublimation

D. melting, condensation, deposition