Thermodynamics for Chemical Quiz 9

1 / 50

**The third law of thermodynamics states that the___________?**

2 / 50

**The theoretical minimum work required to separate one mole of a liquid mixture at 1 atm, containing 50 mole % each of n- heptane and n- octane into pure compounds each at 1 atm is___________?**

3 / 50

**The necessary condition for phase equilibrium in a multiphase system of N components is that the______?**

4 / 50

**The number of degree of freedom for an Azeotropic mixture of ethanol and water in vapourliquid equilibrium, is___________?**

5 / 50

**The quantitative effect of temperature on chemical equilibrium is given by the______?**

6 / 50

**The standard Gibbs free energy change of a reaction depends on the equilibrium________?**

7 / 50

**Third law of thermodynamics is concerned with the___________?**

8 / 50

**Trouton?s ratio of _______ liquids is calculated using Kistyakowsky equation?**

9 / 50

**The work done in isothermal compression compared to that in adiabatic compression will be___________?**

10 / 50

**The partial molar enthalpy of a component in an ideal binary gas mixture of composition Z, at a temperature T and pressure P, is a function only of_________?**

11 / 50

**What happens in a reversible adiabatic compression ?**

12 / 50

**The number of degrees of freedom for an azeotropic mixture in a two component vapourliquid equilibria is/are___________?**

13 / 50

**The value of gas constant ?R? is___________?**

14 / 50

**The temperature at which both liquid and gas phases are identical, is called the ______ point?**

15 / 50

**The reaction A (l) ? R(g) is allowed to reach equilibrium conditions in an autoclave. At equilibrium, there are two phases, one a pure liquid phase of A and the other a vapor phase of A, R and S. Initially A alone is present. The numbers of degrees of freedom are ?**

16 / 50

**Throttling (Joule-Thomson effect) process is a constant ______ process?**

17 / 50

**Water on heating from 1 to 4?C_____?**

18 / 50

**The standard state of a gas (at a given temperature) is the state in which fugacity is equal to___________?**

19 / 50

**The thermodynamic law, PVy = constant, is not applicable in case of_______?**

20 / 50

**There is a change in _______ during the phase transition?**

21 / 50

**Throttling process is a/an ______ process?**

22 / 50

**The root mean square speed of molecules of a gas is equal to (where, m = mass of the molecule K = Boltzmann?s constant, T = absolute temperature) ?**

23 / 50

**The work done in an adiabatic change in a particular gas depends upon changes in the _______ only?**

24 / 50

**Two substances are in equilibrium in a reversible chemical reaction. If the concentration of each substance is doubled, then the value of the equilibrium constant will be_____?**

25 / 50

**The variation of heat of reaction with temperature at constant pressure is given by the _____ law?**

26 / 50

**The ratio of equilibrium constants (Kp2/Kp1) at two different temperatures is given by______?**

27 / 50

**The number of degrees of freedom for a mixture of ice and water (liquid) are ______?**

28 / 50

**Vapour which is at a pressure smaller than the saturation pressure for the temperature involved is called a ______ vapour?**

29 / 50

**The partial pressure of each constituent present in an alloy is ______ the total vapor pressure exerted by the alloy?**

30 / 50

**The unit of equilibrium constant of a chemical reaction is the same as that of___________?**

31 / 50

**The number of degrees of freedom at the triple point of water is___________?**

32 / 50

**Trouton?s ratio is given by (where ?b, = molal heat of vaporisation of a substance at its normal boiling point, kcal/kmol Tb = normal boiling point, ?K) _____?**

33 / 50

**The point at which all the three (solid, liquid and gas) phases co-exist, is known as the _____ point?**

34 / 50

**The total change in the enthalpy of a system is independent of the _________?**

35 / 50

**The value of Joule-Thomson co-efficient, in case where cooling occurs after the throttling process is_________?**

36 / 50

**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?**

37 / 50

**The unity of Planck?s constant ?h? in the equation, E = hv is______?**

38 / 50

**The principle applied in liquefaction of gases is_______?**

39 / 50

**The shape of T-S diagram for Carnot Cycle is a___________?**

40 / 50

**The temperature at the eutectic point of the system is the ______ temperature that can be attained in the system?**

41 / 50

**Van Laar equation deals with the activity co-efficients in_____?**

42 / 50

**The unit of fugacity is the same as that of the__________?**

43 / 50

**Variation of equilibrium pressure with temperature for any two phases of a given substances is given by the _____ equation?**

44 / 50

**To obtain integrated form of Clausius-Clapeyron equation, ln (P2/P1) = (?HV/R) (1/T1 ? 1/T2) from the exact Clapeyron equation, it is assumed that the______?**

45 / 50

**The value of Cp & Cv respectively for monatomic gases in Kcal/kg Mole.?K are_________?**

46 / 50

**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?**

47 / 50

**Thermal efficiency of a Carnot engine can approach 100%, only when the temperature of the___________?**

48 / 50

**Translational kinetic energy of molecules of an ideal gas is proportional to (where, T = absolute temperature of the gas)___________?**

49 / 50

**The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called the _____ temperature?**

50 / 50

**Third law of thermodynamics is helpful in_____?**

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