Thermodynamics for Chemical Mcqs


Q.  For an ideal liquid solution, which of the following is unity ?

a. Activity
b. Fugacity
c. Activity co-efficient
d. Fugacity co-efficient


ANSWER: See Answer
 
No explanation is available for this question!
MCQs:  Trouton’s ratio is given by (where λb, = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, °K) ___________________?
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MCQs:  Joule-Thomson co-efficient depends on the_____________________?
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MCQs:  Which of the following processes cannot be made reversible even under ideal condition of operation ?
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MCQs:  “Law of corresponding states” says that___________________?
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MCQs:  Internal energy of an element at 1 atm and 25° C is ____________ kcal/kg.mole?
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MCQs:  For a constant volume process _____________ by the system is used only to increase the internal energy?
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MCQs:  A change in state involving a decrease in entropy can be spontaneous, only if ____________________?
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MCQs:  Specific _____________ does not change during phase change at constant temperature and pressure?
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MCQs:  High _____________ is an undesirable property for a good refrigerant?
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MCQs:  Which of the following liquid metals has the highest thermal conductivity ?
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MCQs:  If heat contents of CH4, C2H4 and C3H8 are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH4(g) + C2H4(g) ⇌ C3H8(g) will be _____________ Kcal?
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MCQs:  Steam undergoes isentropic expansion in a turbine from 5000 kPa and 400°C (entropy = 6.65 kJ/kg K) to 150 kPa) (entropy of saturated liquid = 1.4336 kJ/kg. K, entropy of saturated vapour = 7.2234 kJ/kg. K) The exit condition of steam is_______________?
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MCQs:  The expression, ΔG = nRT. ln(P2/P1), gives the free energy change______________?
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MCQs:  What is the degree of freedom for two miscible (non-reacting) substances in vapor-liquid equilibrium forming an azeotrope ?
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MCQs:  For any system, what is the minimum number of degrees of freedom ?
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MCQs:  At the critical point of a substance____________?
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MCQs:  The number of degrees of freedom for an azeotropic mixture in a two component vapourliquid equilibria is/are__________________?
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MCQs:  The freezing point of a liquid decreases when the pressure is increased, if the liquid ____________ while freezing?
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MCQs:  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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MCQs:  Molar heat capacity of water in equilibrium with ice at constant pressure is __________ Kcal/kg mole. °K___________________?
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