Spontaneous Processes and Entropy Quiz

What is the term used to describe a process that occurs without external energy input?

• Nonspontaneous

• Reversible

• Spontaneous

• Equilibrium

Which of the following is an example of a spontaneous process?

• Rusting of iron

• Iron formation from iron (III) oxide

• Water freezing at room temperature

• Gas compression without external work

What is required for a nonspontaneous process to occur?

• Decrease in entropy

• Increase in energy

• External energy input

• Catalyst

If a process is spontaneous at a given temperature, what is true of its reverse process?

• It is also spontaneous.

• It is nonspontaneous.

• It is at equilibrium.

• It requires no energy change.

What thermodynamic property is a measure of the disorder or randomness in a system?

• Enthalpy

• Entropy

• Gibbs free energy

• Heat capacity

Which of the following statements best describes a system with high entropy?

• It is highly ordered.

• It has few microstates.

• It is highly disordered.

• It has low energy levels.

What letter is used to denote entropy?

• H

• G

• S

• U

What is a microstate?

• The total energy of a system

• A specific arrangement of particles in a system

• The degree of disorder in a system

• The average kinetic energy of particles

In a system with four particles in a container with two partitions, how many total microstates are possible?

• 4

• 8

• 12

• 16

Which arrangement of particles in the two-partition container has the highest entropy?

• All particles on the left

• All particles on the right

• One particle on the left, three on the right

• Two particles on each side