Thermodynamics and Chemical Equilibrium Quiz

The significance of the second law of thermodynamics is that it:

• Establishes the direction of spontaneous processes and the concept of entropy.

• Establishes the direction of non-spontaneous processes.

• Has no significance in thermodynamics.

A catalyst affects the reaction rate by:

• Lowering the activation energy of the reaction.

• Increasing the activation energy of the reaction.

• Having no effect on the activation energy.

If a gaseous equilibrium system is subjected to an increase in temperature, the system will shift in the direction that:

• Absorbs more heat.

• Releases heat.

• Remains unchanged.

According to the Bronsted- Lowry theory, an acid is defined as a substance that:

• Donates a proton (H+).

• Accepts a proton (H+).

• Neither donates nor accepts protons.

The second law of thermodynamics highlights:

• The natural tendency of systems to evolve towards greater disorder.

• The natural tendency of systems to evolve towards order.

• The irrelevance of disorder in thermodynamics.

In a dynamic equilibrium, which statement is true?

• The reaction rates of the forward and reverse reactions are equal, but the concentrations of reactants and products remain constant.

• The reaction rates are unequal.

• The concentrations of reactants and products are always changing.

Activation energy is the energy required for:

• The reaction to begin.

• The reaction to end.

• The reaction to proceed at a constant rate.

According to the second law of thermodynamics, a spontaneous process is one that:

• Increases the entropy of the universe.

• Decreases the entropy of the universe.

• Has no effect on the entropy of the universe.

The second law of thermodynamics predicts that:

• Heat flows spontaneously from a hotter object to a colder object.

• Heat flows spontaneously from a colder object to a hotter object.

• Heat does not flow spontaneously.

Processes that do not proceed to only one side of the reaction, some of the products may be converted back into reactants are called?

• Reversible reaction

• Irreversible reaction

• Spontaneous reaction