Test Your Knowledge

1.Suppose 40.00 J of energy is transferred by heat to a system, while the system does 10.00 J of work. Later, heat transfers 25.00 J out of the system, while 4.00 J is done by work on the system. What is the net change in the system’s internal energy?

15J
6J
9J
21J

2. What is the change in the internal energy of a system when a total of 150.00 J is transferred by heat from the system and 159.00 J is done by work on the system?

8J
5J
6J
9J

3. What is internal energy?

It is the sum of the kinetic energies of a system’s atoms and molecules.

It is the sum of the potential energies of a system’s atoms and molecules.
It is the sum of the kinetic and potential energies of a system’s atoms and molecules.
It is the difference between the magnitudes of the kinetic and potential energies of a system’s atoms and molecules.

4. It states that the entropy of a pure crystal at absolute zero is zero.

First Law of Thermodynamics
Second Law of Thermodynamics
Third Law of Thermodynamics
Entropy

5. It states that heat transfer occurs spontaneously from higher- to lower-temperature bodies but never spontaneously in the reverse direction.

First Law of Thermodynamics
Second Law of Thermodynamics
Third Law of Thermodynamics
Entropy

6.  Entropy in any closed system always increases; it never decreases.

True
False

7. In a system,it is a measure of disorder.

First Law of Thermodynamics

Second Law of Thermodynamics
Third Law of Thermodynamics
Entropy

8. Heat transfer occurs spontaneously from a hot object to a cold one.

True
False

9. ___________states that the change in internal energy of a system equals the net heat transfer into the system minus the net work done by the system.

First Law of Thermodynamics

Second Law of Thermodynamics
Third Law of Thermodynamics
Entropy

10. The absolute zero temperature is the _______ for determination entropy.

First Law of Thermodynamics

Reference Point
Enthalpy
Entropy

CHECK YOUR ANSWER