Chemical Engineering Thermodynamics

421. The third law of thermodynamics states that the

1. Heat capacity of a crystalline solid is zero at absolute zero temperature
2. Heat transfer from low temperature to high temperature source is not possible without external work
3. Gases having same reduced properties behaves similarly
4. None of these

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422. The total change in the enthalpy of a system is independent of the

1. Number of intermediate chemical reactions involved
2. Pressure and temperature
3. State of combination and aggregation in the beginning and at the end of the reaction
4. None of these

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423. The unit of equilibrium constant of a chemical reaction is the same as that of

1. Molar concentration
2. Temperature
3. Internal energy
4. None of these

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424. The unit of fugacity is the same as that of the

1. Pressure
2. Temperature
3. Volume
4. Molar concentration

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425. The unity of Planck's constant 'h' in the equation, E = hv is

1. J/s
2. J.S
3. J/kmol
4. kmol/J

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426. The value of Cp & Cv respectively for monatomic gases in Kcal/kg Mole.°K are

1. 5 & 3
2. 3.987 & 1.987
3. 1.987 & 0.66
4. 0.66 & 1.987

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427. The value of gas constant 'R' is

1. 1.987 cal/gm mole °K
2. 1.987 BTU/lb. mole °R
3. Both (A) and (B)
4. Neither (A) nor (B)

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429. The variation of heat of reaction with temperature at constant pressure is given by the _________ law.

1. Kelvin's
2. Antoine’s
3. Kirchoff’s
4. None of these

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430. The work done in an adiabatic change in a particular gas depends upon changes in the _________ only.

1. Temperature
2. Specific heat
3. Volume
4. Pressure

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