DE -- 2nd Law thermodynamics

The second law of thermodynamics deals with ---

• the total amount of energy in a system.

• the transfer of heat from one object to another.

• the conservation of energy in a closed system.

• with the direction taken by spontaneous processes.

An irreversible process depends on ---

• time

• temperature

• path

• total energy

The examples shown in the pictures depict ---

• examples of isothermal processes

• examples of 1-way processes in nature

• examples of energy not being conserved

• examples of thermal equilibrium

What does the Q_h represent in the diagram?

• total thermal energy

• heat transfer due to friction

• heat transfer from the hot object

• entropy of the hot object

What does the Q_c represent in the diagram?

• heat transfer into the cold reservoir

• total thermal energy of the system

• total work done by the cold object

• heat transfer into the hot object

The second expression of the 2nd Law of Thermodynamics:

• Heat always flows from a hotter to a colder body.

• it is impossible to completely convert the work efficiently

• energy is neither created nor destroyed

• Energy is conserved in a closed system.

What happens in a cyclical process?

• the system progresses in a linear fashion

• the system experiences a continuous change

• the system returns to its original state at the end of every cycle

• the system never repeats itself efficiently