Physical Chemistry

Question 1

What is the unit of the rate constant for a first-order reaction?

Accepted Answer

s⁻¹

Answer

mol/L·s

Answer

L/mol·s

Answer

mol²/L²·s

Question 2

Which law relates the pressure, volume, and temperature of an ideal gas?

Accepted Answer

Ideal gas law

Answer

Boyle's law

Answer

Charles's law

Answer

Avogadro's law

Question 3

What is the enthalpy change for a reaction at constant pressure called?

Accepted Answer

Enthalpy change

Answer

Work done

Answer

Internal energy change

Answer

Entropy change

Question 4

What is the term for the measure of disorder in a system?

Accepted Answer

Entropy

Answer

Enthalpy

Answer

Free energy

Answer

Heat capacity

Question 5

Which of the following processes is exothermic?

Accepted Answer

Condensation

Answer

Melting

Answer

Evaporation

Answer

Sublimation

Question 6

What is the significance of a catalyst in a chemical reaction?

Accepted Answer

Decreases activation energy

Answer

Increases activation energy

Answer

Changes the equilibrium constant

Answer

Consumes the reactants faster