Q. "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

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

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Q. Which one is true for a throttling process ?

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Q. A gas performs the maximum work, when it expands

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Q. There is a change in __________ during the phase transition.

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Q. Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is

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Q. First law of thermodynamics deals with the

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Q. 1m³ of an ideal gas at 500 K and 1000 kPa expands reversibly to 5 times its initial volume in an insulated container. If the specific heat capacity (at constant pressure) of the gas is 21 J/mole . K, the final temperature will be

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Q. For a thermodynamic system containing 'x' chemical species, the maximum number of phases that can co-exist at equilibrium is

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Q. A reasonably general expression for vapour-liquid phase equilibrium at low to moderate pressure is Φᵢ yᵢ P = Yᵢ xᵢ fᵢ° where, Φ is a vapor fugacity component, Yᵢ is the liquid activity co-efficient and fᵢ° is the fugacity of the pure component i. The Kᵢ value (Yᵢ = Kᵢ xᵢ) is therefore, in general a function of

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

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

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Q. Which of the following is affected by the temperature ?

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Q. Work done may be calculated by the expression ꭍp dA for __________ processes.

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Q. The molar excess Gibbs free energy, gᴱ, for a binary liquid mixture at T and P is given by, (gᴱ/RT) = A . x₁. x₂, where A is a constant. The corresponding equation for ln y₁, where y₁ is the activity co-efficient of component 1, is

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Q. The adiabatic throttling process of a perfect gas is one of constant enthalpy

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Q. For spontaneous changes in an isolated system (S = entropy)

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Q. The second law of thermodynamics states that

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Q. Internal energy of an ideal gas

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

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