Entropy in Thermodynamics

What is the symbol for entropy?

• H

• G

• S

• E

Entropy is a measure of

• accuracy

• precision

• the disorder of a system

• the attraction of a nucleus for an electron

Entropy is a form of energy

• True

• False

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

What can change the entropy of a fixed mass?

• Heat Transfer

• Adiabatic process

• Reversible process

• Work

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.

Which type of process can serve as an appropriate model for actual processes?

• Isobaric process

• Isothermal process

• Isentropic process

• Adiabatic process

Why should specific volume, v be kept as small as possible during compression?

• To minimize work input

• To maximize work input

• To minimize work output

Is it possible to create entropy?

• Yes

• No

The entropy of steam will (increase, decrease, remain the same) as it flows through an actual adiabatic turbine.