### Related Questions

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# Which of the following is Virial equation of state?

A. (p + a/V^{2})(V - b) = nRT

C. PV = A + B/V + C/V^{2} + D/V^{3} + ...

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# In a homogeneous solution, the fugacity of a component depends upon the

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# Which is not a refrigerant?

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# High pressure steam is expanded adiabatically and reversibly through a well insulated turbine, which produces some shaft work. If the enthalpy change and entropy change across the turbine are represented by ΔH and ΔS respectively for this process:

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# If two gases have same reduced temperature and reduced pressure, then they will have the same

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# High __________ is an undesirable property for a good refrigerant.

B. Latent heat of vaporisation

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# A reasonably general expression for vapourliquid phase equilibrium at low to moderate pressure is φ_{i} y_{i} P = Y_{i} x_{i}f_{i}° where, Φ is a vapor fugacity component, Y_{i} is the liquid activity co-efficient and f_{i}° is the fugacity of the pure component i. the K_{i} value (Y_{i} = K_{i} x_{i}) is therefore, in general a function of

B. Temperature and pressure only

C. Temperature, pressure and liquid composition x_{i} only

D. Temperature, pressure, liquid composition x_{i} and vapour composition yi

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# (∂T/∂P)H is the mathematical expression for

A. Specific heat at constant pressure (C_{p})

B. Specific heat at constant volume (C_{v})

C. Joule-Thompson co-efficient

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# Pick out the wrong statement

A. Phase rule variables are intensive properties

B. Heat and work are both state function

C. The work done by expansion of a gas in vacuum is zero

D. C_{P} and C_{V} are state function

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# The following heat engine produces power of 100,000 kW. The heat engine operates between 800 K and 300 K. It has a thermal efficiency equal to 50% of that of the Carnot engine for the same temperature. The rate at which heat is absorbed from the hot reservoir is

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# Compressibility factor-reduced pressure plot on reduced co-ordinates facilitates

A. Use of only one graph for all gases

B. Covering of wide range

D. More accurate plotting

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# Which of the following will increase the volume of a real gas by four times?

A. Doubling the absolute temperature as well as pressure of the gas

B. Reducing pressure to one fourth at constant temperature

C. Reducing temperature to one fourth at constant pressure

D. Reducing the temperature to half and doubling the pressure

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# Sublimation temperature of dry ice (solid CO_{2}) is __________ °C.

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# One ton of refrigeration capacity is equivalent to the heat removal rate of

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# A gas shows deviation from ideal behaviour at

A. Low pressure and high temperature

B. Low pressure and low temperature

C. Low temperature and high pressure

D. High temperature and high pressure

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# In any spontaneous process,

C. Both F and A decreases

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# An ideal gas is taken around the cycle ABCA as shown in P-V diagram below: The work done by the gas during the cycle is equal to

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# For an irreversible process involving only pressure-volume work

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# In vapour compression refrigeration system, if the evaporator temperature and the condenser temperatures are -13°C and 37°C respectively, the Carnot COP will be

D. Data insufficient, can't be found out

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# At normal boiling point, molar entropy of vaporisation is __________ Joule/K°.mole.

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# Equilibrium constant of a reaction varies with the

A. Initial concentration of the reactant

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# A two stage compressor is used to compress an ideal gas. The gas is cooled to the initial temperature after each stage. The intermediate pressure for the minimum total work requirement should be equal to the __________ mean of P_{1} and P_{2}. (where, P_{1} and P_{2} are initial and final pressures respectively)

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# Entropy change of the reaction, H2O (liquid) → H2O (gas), is termed as the enthalpy of

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# Critical temperature is defined as the temperature above which a gas will

A. Not liquify (barring exceptions)

C. Never liquify however high the pressure may be

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# The temperature at the eutectic point of the system is the __________ temperature that can be attained in the system.

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# A system is said to be isopiestic, if there is no __________ change.

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# In Joule-Thomson porous plug experiment, the

A. Enthalpy does not remain constant

B. Entire apparatus is exposed to surroundings

C. Temperature remains constant

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# For a single component two phase mixture, the number of independent variable properties are

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# Which is a state function?

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# In an ideal gas mixture, fugacity of a species is equal to its