Laws of Thermodynamics Quiz

What does the first law of thermodynamics state?

• Energy is always increasing.

• Energy flows from cold to hot.

• Energy is conserved and only changes forms.

• Energy can be created and destroyed.

What new concept does the second law of thermodynamics introduce?

• Temperature

• Energy conservation

• Enthalpy

• Entropy

How is entropy most easily described?

• Order

• Energy

• Temperature

• Disorder

Why does heat flow from a hot coffee cup to a table?

• Because the table absorbs energy.

• Because the coffee cup is colder.

• Because heat energy is more disordered when dispersed.

• Because the table is hotter.

What does the third law of thermodynamics state about a perfectly crystalline solid at absolute zero?

• It is in a disordered state.

• It has zero entropy.

• It has maximum entropy.

• It has infinite energy.

What does Gibbs free energy tell us about a process?

• Its entropy

• Its enthalpy

• Its temperature

• Its spontaneity

What is the significance of a negative delta G in Gibbs free energy?

• The process is exothermic.

• The process is spontaneous.

• The process is nonspontaneous.

• The process is endothermic.

How do soap molecules help in cleaning dirt?

• By increasing the temperature

• By forming micelles with polar heads facing out

• By decreasing the entropy

• By dissolving in water

What allows soap molecules to trap dirt effectively?

• Their low entropy

• Their high temperature

• Their crystalline structure

• Their polar heads and nonpolar tails

What does the second law of thermodynamics imply about the entropy of the universe?

• It is always decreasing.

• It remains constant.

• It is always increasing.

• It fluctuates randomly.