chemical engineering thermodynamics for chemical chemical engineering MCQs – Page 17

Practise multiple-choice questions from chemical engineering thermodynamics for chemical chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering thermodynamics for chemical chemical engineering Mcqs
321. The third law of thermodynamics states that the__________________?
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A. Heat transfer from low temperature to high temperature source is not possible without external

B. Gases having same reduced properties behaves similarly

C. k

D. None of these

E. Heat capacity of a crystalline solid is zero at absolute zero temperature
322. The gas law (PV = RT) is true for an ______________ change?
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A. Isothermal

B. Adiabatic

C. Both A. & B

D. Neither A. nor B

323. (?T/?P)H is the mathematical expression for__________________?
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A. Specific heat at constant volume (Cv)

B. Joule-Thompson co-efficient

C. Specific heat at constant pressure (Cp)

D. None of these

324. Which of the following equations is used for the prediction of activity co-efficient from experiments ?
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A. Van Laar equation

B. All A, B. and C

C. Margules equation

D. Wilsons equation

325. Pick out the correct statement?
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A. A process is irreversible as long as ? S for the system is greater than zero

B. The mechanical work done by a system is always equal to?P.dV

C. mation of the compound from its reactants</strong>

D. If an insoluble gas is passed through a volatile liquid placed in a perfectly insulated container,

E. temperature of the liquid will increase

F. The heat of formation of a compound is defined as the heat of reaction leading to the
326. Joule-Thomson experiment is__________________?
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A. Isobaric

B. Adiabatic

C. Isenthalpic

D. Both B. & C.
327. Water on heating from 1 to 4C___________________?
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A. Has same volume

B. Expands

C. May contract or expand

D. Contracts
328. With increase in temperature, the atomic heat capacities of all solid elements_________________?
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A. Remains unchanged

B. Decreases linearly

C. Increases

D. Decreases

329. If heat contents of CH4, C2H4 and C3H8 are -17.9, 12.5 and -24.8 kcal/mole respectively, than ?H for the reaction CH4(g) + C2H4(g) ? C3H8(g) will be _____________ Kcal?
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A. 55.2

B. -55.2

C. -30.2

D. -19.4
330. Heating of water under atmospheric pressure is an ______________ process?
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A. Isobaric

B. Isothermal

C. Isochoric

D. Adiabatic

331. Those solutions in which there is no volume change upon mixing the components in the liquid state and which, when diluted do not undergo any heat change (i.e. heat of dilution is zero), are called ____________ solutions?
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A. Isotonic

B. Real

C. Ideal

D. None of these

332. The extensive properties are____________________?
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A. Volume, mass and number of moles

B. Free energy, entropy and enthalpy

C. Both A. and B

D. None of these

333. Heat evolved/absorbed during conversion of a substance from one allotropic form to another is termed as the heat of______________?
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A. Fusion

B. Vaporisation

C. None of these

D. Transition
334. A refrigerator may be termed as a____________________?
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A. None of these

B. Heat engine

C. Heat pump

D. Carnot engine

335. In an ideal refrigeration cycle, the change in internal energy of the fluid is_____________?
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A. Either of the above three; depends on the nature of refrigerant

B. 0

C. #NAME?

D. #NAME?

336. For an ideal liquid solution, which of the following is unity ?
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A. Fugacity co-efficient

B. Activity co-efficient

C. Activity

D. Fugacity

337. An ideal liquid refrigerant should______________________?
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A. Not have a sub-atmospheric vapour pressure at the temperature in the refrigerator coils

B. Not have unduly high vapour pressure at the condenser temperature

C. Both A. and B

D. Have low specific heat

338. Boyles law for gases states that____________________?
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A. P ? V, at constant temperature & mass of the gas

B. P ? 1/V, when temperature is constant

C. P/V = constant, for any gas

D. P ? 1/V, when temperature & mass of the gas remain constant
339. Law of corresponding states says that___________________?
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A. No gas can be liquefied above the critical temperature, howsoever high the pressure may be.

B. ories)

C. Two different gases behave similarly, if their reduced properties (i.e. P, V and T) are same

D. The molar heat of energy of gas at constant volume should be nearly constant (about 3

E. The surface of separation (i. e. the meniscus) between liquid and vapour phase disappears at

F. critical temperature

340. For a constant volume process _____________ by the system is used only to increase the internal energy?
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A. Heat absorbed

B. Work done

C. Both A. & B

D. Neither A. nor B