Thermodynamics

What is the unit of entropy?

• Joule

• Watt

• J/K

• Pascal

What is an adiabatic process?

• Constant pressure

• No changes of temperature

• No heat transfer

• Constant volume

What is the definition of enthalpy?

• Internal energy + pressure * volume

• Internal energy - pressure * volume

• Heat / temperature

• Work / temperature

What is the definition of heat capacity?

• Heat / volume

• Heat / mass

• Heat / temperature change

• Work / temperature change

What is a reversible process?

• Spontaneous process

• Ideal process, no entropy generation

• A process that returns to its original configuration

• A process that returns to predefined energy level

What is the definition of Gibbs free energy?

• Enthalpy - temperature * entropy

• Enthalpy + temperature * entropy

• Internal energy - pressure * volume

• Internal energy + pressure * volume

What is the definition of thermal equilibrium?

• Equal pressure

• Equal heath capacity

• No heat transfer

• No entropy changes

For a closed system, the first law of thermodynamics states:

• ΔU = Q + W

• ΔU = W – Q

• ΔU = Q – W

• ΔU = Q × W

In an ideal reversible process, the total entropy change of the universe is:

• Zero

• Positive

•  Negative

• Diverges positively

Enthalpy (H) is defined as:

• H = U – PV

• H = U + PV

• H = Q + W

• H = U/V