Chemistry Test Physical Chemistry 2

Question 1

Which thermodynamic quantity remains constant in an adiabatic process?

Accepted Answer

Heat (q = 0)

Answer

Entropy

Answer

Temperature

Answer

Pressure

Question 2

The van't Hoff factor (i) for a strong electrolyte like NaCl dissolved in water is approximately:

Accepted Answer

2

Answer

1

Answer

0.5

Answer

3

Question 3

According to the Arrhenius equation, plotting ln(k) vs 1/T yields a slope of:

Accepted Answer

-Ea/R

Answer

Ea/R

Answer

-R/Ea

Answer

Ea·R

Question 4

What does a negative value of ΔG indicate about a chemical reaction?

Accepted Answer

The reaction is spontaneous

Answer

The reaction is non-spontaneous

Answer

The reaction is at equilibrium

Answer

The reaction absorbs heat

Question 5

Which colligative property is used to determine the molar mass of a polymer dissolved in solution?

Accepted Answer

Osmotic pressure

Answer

Boiling point elevation

Answer

Freezing point depression

Answer

Vapor pressure lowering

Question 6

In a reaction where the order is zero with respect to a reactant, the rate:

Accepted Answer

Is unaffected by that reactant's concentration

Answer

Doubles when that reactant's concentration doubles

Answer

Halves when that reactant's concentration doubles

Answer

Is proportional to the square of the concentration

Question 7

The Debye-Hückel limiting law applies to solutions that are:

Accepted Answer

Dilute strong electrolytes

Answer

Concentrated strong electrolytes

Answer

Concentrated weak acids

Answer

Non-electrolyte mixtures