1) Which of the following descriptions is reasonable? (circle as many as appropr

Question

1) Which of the following descriptions is reasonable? (circle as many as appropriate)

A) The flow of air over a mountain range, resulting in a Chinook wind on the Americanhigh

            plains, is an adiabatic process.

B) An explosion in a bomb calorimeter as the result of complete combustion of a fuel isan

            isobaric process.

C) The explosion of a filled soda can in an aluminum recycling plant can be consideredas a

            reversible process.

D) The engine in a Toyota Prius is so efficient, it does not operate as a thermodynamiccycle.

E) The very slow flow of air through a heat duct is a reversible process.

2) For a closed system which one, if any, of the following statements is true for anisobaric process occurring at a constant pressure P but false for an isochoric processoccurring at a constant volume V?

A) The energy balance is %u0394U + %u0394Ek+ %u0394Ep= Q + W.

B) The P-V work can be determined as W = -P%u0394V.

C) The change in internal energy can be determined as %u0394U = Uf%u2013 Ui.

D) The heat transferred is related to the change in enthalpy as Q = %u0394H.

E) All of the above statements are true for both types of processes.

3) Which of the following properties affect(s) the molar internal energy for an idealgas?

A) Temperature                                   B) Temperature and volume

C) Temperature and pressure             D) Temperature, volume, and pressure

4) Which one, if any, of the following statements is inappropriate to describechanges in energy associated with braking a car to a panic stop?

A) The braking process can be modeled as adiabatic because it occurs very fast.

B) In a standard gasoline-powered car the kinetic energy the car had before braking isnot saved

            to power the car after braking.

C) In a standard gasoline-powered car the temperature of the braking system increasesupon

            braking.

D) The volume of the braking system does not change appreciably upon braking.

E) In a hybrid vehicle the kinetic energy the car had before braking is saved to a battery;this

            process involves electrical work.

F) None of the above statements are inappropriate.

Explanation / Answer

1)B) An explosion in a bomb calorimeter as the result of complete combustion of a fuel isan

            isobaric process.

C) The explosion of a filled soda can in an aluminum recycling plant can be consideredas a

            reversible process.

2)C) The change in internal energy can be determined as %u0394U = Uf%u2013 Ui.

3) B) Temperature and volume

            process involves electrical work.

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.