Q. Claude gas liquefaction process employs cooling

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Q. As the temperature is lowered towards the absolute zero, the value of ∂(ΔF)/∂T, then approaches

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Q. Which of the following is not affected by temperature changes ?

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Q. For an ideal gas, the activity co-efficient is

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Q. Those solutions in which there is no volume change upon mixing the components in the liquid state and which, when diluted do not undergo any heat change (i.e. heat of dilution is zero), are called __________ solutions.

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Q. Critical compressibility factor for all substances

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Q. What is the degree of freedom for two mis-cible (non-reacting) substances in vapor-liquid equilibrium forming an azeotrope ?

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

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Q. In case of vapour compression refrigeration system, elevating the evaporator temperature (keeping the condenser temperature constant) results in

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Q. For water at 300°C, it has a vapour pressure 8592.7 kPa and fugacity 6738.9 kPa Under these conditions, one mole of water in liquid phase has a volume of 25.28 cm³ and that in vapour phase in 391.1 cm³.Fugacity of water (in kPa) at 9000 kPa will be

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Q. The heat capacities for the ideal gas state depend upon the

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

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Q. Pick out the wrong statement.

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Q. The equation, PV = nRT, is best obeyed by gases at

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Q. Internal energy of an element at 1 atm and 25° C is __________ kcal/kg.mole.

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Q. Generation of heat by friction is an example of a/an __________ change.

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Q. A domestic refrigerator has a/an __________ cooled condenser.

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Q. The extensive properties are

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Q. The compressibility factor of a gas is given by (where, V1 = actual volume of the gas V2 = gas volume predicted by ideal gas law )

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Q. If we increase the pressure on a substance (which is at its triple point), then the triple point

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