### Related Questions

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# Fundamental principle of refrigeration is based on the __________ law of thermodynamics.

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# The internal energy of an ideal gas is a function of its __________ only.

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# Pick out the extensive property out of the following.

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# In a P-V diagram (for an ideal gas), an isothermal curve will coincide within adiabatic curve (through a point), when

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# C_{v} is given by

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# A refrigeration cycle is a reversed heat engine. Which of the following has the maximum value of the co-efficient of performance (COP) for a given refrigeration effect?

A. Vapor compression cycle using expansion valve

B. Air refrigeration cycle

C. Vapor compression cycle using expansion engine

D. Carnot refrigeration cycle

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# The equation relating E, P, V and T which is true for all substances under all conditions is given by (∂E/∂V)_{T} = T(∂P/∂T)_{H} - P. This equation is called the

B. Thermodynamic equation of state

D. Redlich-Kwong equation of state

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# Partial molar free energy of an element A in solution is same as its

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# The equation Tds = dE - PdV applies to

A. Single phase fluid of varying composition

B. Single phase fluid of constant composition

C. Open as well as closed systems

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# For a given substance at a specified temperature, activity is __________ to fugacity.

B. Inversely proportional

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# Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ____with the increase of reduced temperature.

D. Decreases logarithmically

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# The value of gas constant 'R' is

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# A system in which there is exchange of energy but not of mass, is called a/an __________ system.

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# Which of the following equations is used for the prediction of activity co-efficient from experiments?

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# Which law of the thermodynamics provides basis for measuring the thermodynamic property?

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# Gibbs-Helmholtz equation is

A. ΔF = ΔH + T [∂(ΔF)/∂T]P

D. dP/dT = ΔH_{vap}/T.ΔV_{vap}

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# Fugacity and pressure are numerically not equal for the gases

A. At low temperature and high pressure

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# Lenz's law results from the law of conservation of

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# PV^{y} = constant, holds good for an isentropic process, which is

A. Reversible and isothermal

B. Isothermal and irreversible

C. Reversible and adiabatic

D. Adiabatic and irreversible

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# Degrees of freedom at triple point will be

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# The work done in isothermal compression compared to that in adiabatic compression will be

D. More or less depending upon the extent of work done

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

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# Enthalpy changes over a constant pressure path are always zero for __________ gas.

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# On opening the door of an operating refrigerator kept in a closed room, the temperature of the room will

D. Increase in summer and will decrease in winter

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# Van Laar equation deals with the activity coefficients in

C. Azeotropic mixture only

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# If the heat of solution of an ideal gas in a liquid is negative, then its solubility at a given partial pressure varies with the temperature as

A. Solubility increases as temperature increases

B. Solubility increases as temperature decreases

C. Solubility is independent of temperature

D. Solubility increases or decreases with temperature depending on the Gibbs free energy change of solution

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# A cyclic engine exchanges heat with two reservoirs maintained at 100 and 300°C respectively. The maximum work (in J) that can be obtained from 1000 J of heat extracted from the hot reservoir is

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# __________ explains the equilibrium constant for any chemical reaction.

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# The standard state of a gas (at a given temperature) is the state in which fugacity is equal to

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# In a reversible chemical reaction (where, Δx = number of moles of products-number of moles of reactants)

A. Addition of inert gas favours the forward reaction, when Δx is positive

B. Pressure has no effect on equilibrium, when Δn = 0

C. Addition of inert gas has no effect on the equilibrium constant at constant volume for any value of Δx (+ ve, - ve) or zero)