Thermodynamics Review

What unit do you use to measure Thermal Energy?

• J/Kg ºC

• Kg

• ºC

• J

Tags

NGSS.HS-PS3-4

What is the symbol for Specific Heat

• Q

• t

• m

• C

The unit for specific heat is

• J

• J/gC

• g

Which of the following statements is true about an isentropic process?

• An isentropic process is an irreversible isothermal process.

• An isentropic process is a reversible adiabatic process.

• An isentropic process is a reversible isothermal process.

• An isentropic process is an irreversible adiabatic process.

Tags

NGSS.HS-PS3-4

Which of the following is always a characteristic of an adiabatic process?

• No heat flows into or out of the system (Q = 0).

• The temperature does not change (ΔT = 0).

• No work is done on or by the system (W = 0).

• The internal energy does not change (ΔU = 0).

• The pressure does not change (ΔP = 0).

identify the type of system No:3

• Open System

• Closed system

• Isolated system

Tags

NGSS.HS-PS3-4

identify the type of system No:2

• Open System

• Closed system

• Isolated system

Tags

NGSS.HS-PS3-4

During an irreversible process, the entropy of the universe:

• Increases

• Decreases

• Remains constant

• Becomes zero

What is the equation used to determine the entropy change of a system during a process?

• ΔS = ∫Q/T

• ΔS = ∫dT/Q

• ΔS = ∫PdV/T

• ΔS = ∫dS/P

Why do engineering devices such as pumps, turbines, nozzles, and diffusers perform best when irreversibilities such as friction are minimized?

• Minimizing irreversibilities reduces energy losses and provides less efficient operation.

• Minimizing irreversibilities increases energy losses and provides more efficient operation.

• Minimizing irreversibilities reduces energy losses and provides more efficient operation.

Tags

NGSS.HS-PS3-3

NGSS.HS-PS3-4