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

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1. Heat evolved/absorbed during conversion of a substance from one allotropic form to another is termed…
2. For a multi-component system, the term chemical potential is equivalent to the
3. The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 >…
4. The minimum number of phases that can exist in a system is
5. Which of the following diagrams does not represent an Otto cycle?
6. The unit of equilibrium constant of a chemical reaction is the same as that of
7. If different processes are used to bring about the same chemical reaction, the enthalpy change is same…
8. Number of degrees of freedom for a three phase system in equilibrium comprising of three nonreacting…
9. The value of Joule-Thomson co-efficient, in case where cooling occurs after the throttling process is
10. A domestic refrigerator has a/an __________ cooled condenser.
11. When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the…
12. Compressibility factor-reduced pressure plot on reduced co-ordinates facilitates
13. Fugacity co-efficient of a substance is the ratio of its fugacity to
14. The work done in an adiabatic change in a particular gas depends upon changes in the __________ only.
15. For a cyclic process, a fixed ratio between heat and work
16. Work done is a
17. COP of a refrigerator drawing 1 kW of power per ton of refrigeration is about
18. For an ideal gas, the activity co-efficient is
19. When a gas is subjected to adiabatic expansion, it gets cooled due to
20. Enthalpy of a gas depends upon its
21. The freezing point of a liquid decreases when the pressure is increased, if the liquid __________ while…
22. For equilibrium process (i.e. reversible) in an isolated system
23. First law of thermodynamics deals with the
24. In a P-V diagram (for an ideal gas), an isothermal curve will coincide within adiabatic curve (through…
25. dW and dq are not the exact differential, because q and W are
26. The four properties of a system viz. P, V, T, S are related by __________ equation.
27. What is the degree of freedom for a system comprising liquid water equilibrium with its vapour?
28. At absolute zero temperature, the __________ of the gas is zero.
29. Joule-Thomson co-efficient for a perfect gas is
30. The Maxwell relation derived from the differential expression for the Helmholtz free energy (dA) is

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