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

If two pure liquid constituents are mixed in any proportion to give an ideal solution, there is no change in

A Carnot cycle consists of the following steps :

Third law of thermodynamics is concerned with the

What happens in a reversible adiabatic expansion process ?

Pick out the wrong statement.

Which of the following is affected by the temperature ?

The fusion of a crystalline solid at its melting point to form a liquid at the same temperature is accompanied by

A gas performs the maximum work, when it expands

Compound having large heat of formation is

Pick out the wrong statement.

The relation connecting the fugacities of various components in a solution with one another and to composition at constant temperature and pressure is called the __________ equation.

All gases except __________ shows a cooling effect during throttling process at atmospheric temperature and pressure.

A reasonably general expression for vapour-liquid 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

A solute distributes itself between two non-miscible solvents in contact with each other in such a way that, at a constant temperature, the ratio of its concentrations in two layers is constant, irrespective of its total amount". This is

The internal energy of an ideal gas does not change in a reversible __________ process.

Which of the following equations is obtained on combining 1st and 2nd law of thermodynamics, for a system of constant mass?

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

A refrigerator works on the principle of __________ law of thermodynamics.

'The fugacity of a gas in a mixture is equal to the product of its mole fraction and its fugacity in the pure state at the total pressure of the mixture". This is

One mole of nitrogen at 8 bar andK is contained in a piston-cylinder arrangement. It is brought to 1 bar isothermally against a resisting pressure of 1 bar. The work done (in Joules) by the gas is

Claude's liquefaction process employs the cooling of gases by

Melting of ice is an example of an __________ process.

There is a change in __________ during the phase transition.

Second law of thermodynamics is concerned with the

Fugacity co-efficient of a substance is the ratio of its fugacity to

Which of the following identities can be most easily used to verify steam table data for superheated steam.

High pressure steam is expanded adiabati-cally 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:

Standard temperature and pressure (S.T.P.) is

A solid is transformed into vapour without going to the liquid phase at

What is the degree of freedom for a system comprising liquid water equilibrium with its vapour ?

Pick out the wrong statement.

__________ does not change during phase transformation processes like sublimation, melting & vaporisation.

For a constant pressure reversible process, the enthalpy change (ΔH) of the system is

Lenz's law results from the law of conservation of

In the ammonia synthesis reaction, N₂ + 3H₂ 2NH₃ + 22.4 kcal, the formation of NH₃ will be favoured by

At triple point (for one component system), vapour pressure of solid as compared to that of liquid will be

The effect of changing the evaporator temperature on COP as compared to that of changing the condenser temperature (in vapour compression refrigeration system) is

The chemical potential for a pure substance is __________ its partial molal free energy.

Gibbs free energy (F) is defined as

The internal energy of an incompressible fluid depends upon its

The expression for entropy change given by, ΔS = nR ln (V₂/V₁) + nC_v ln (T₂/T₁) is valid for

Which of the following is true for Virial equation of state ?

Gases are cooled in Joule-Thomson expansion, when it is __________ inversion temperature.

The molar excess Gibbs free energy, g^E, for a binary liquid mixture at T and P is given by, (g^E/RT) = A . x₁. x₂, where A is a constant. The corresponding equation for ln y₁, where y₁ is the activity co-efficient of componentis

The necessary condition for phase equilibrium in a multiphase system of N components is that the

Normal temperature and pressure (N.T.P.) corresponds to

A gas mixture of three components is brought in contact with a dispersion of an organic phase in water. The degree of freedom of the system are

Pick out the wrong statement.

Which one is true for a throttling process ?