The acentric factor of a materical, 'ω', is defined as ω = -log10(Prsat)Tr-1 = 0.7, where, Prsat = reduced vapor pressure, Tr = reduced temperature. The value of acentric factor is always
> 2
< 1
> 1
< 3
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- A system in which there is exchange of energy but not of mass, is called a/an __________ system.
- In case of an __________ process, the temperature of the system increases.
- All gases above its inversion temperature, in a throttling process will show
- Activity co-efficient is a measure of the
- Steam undergoes isentropic expansion in a turbine from 5000 kPa and 400°C (entropy = 6.65 kJ/kg…
- Compressibility factor of a gas is
- The relation connecting the fugacities of various components in a solution with one another and to composition…
- Pick out the correct statement.
- The point at which all the three (solid, liquid and gas) phases co-exist, is known as the __________…
- A liquid under pressure greater than its vapour pressure for the temperature involved is called a __________…
- Which of the following is not correct for a reversible adiabatic process?
- Entropy change for an irreversible isolated system is
- In jet refrigerators, the refrigerating fluid is practically always
- Gibbs free energy (F) is defined as
- Which of the following is a widely used refrigerant in vapour compression refrigeration system (using…
- Which of the following has the least thermal efficiency?
- The co-efficient of performance (COP) of a refrigerating system, which is its index of performance,…
- Specific __________ does not change during a phase change (e.g. sublimation, melting, vaporisation etc.).
- With increase in temperature, the atomic heat capacities of all solid elements
- For an incompressible fluid, the __________ is a function of both pressure as well as temperature.
- The heat capacities for the ideal gas state depend upon the
- Gibbs-Helmholtz equation is
- Which of the following is affected by the temperature?
- Requisites of a reversible process is that the
- A system is said to be isopiestic, if there is no __________ change.
- If the molar heat capacities (Cp or Cv) of the reactants and products of a chemical reaction are identical,…
- Extensive properties of a thermodynamic system depend upon the __________ of the system.
- As the temperature is lowered towards the absolute zero, the value of ∂(ΔF)/∂T, then…
- Dry ice is
- For an ideal gas, the activity co-efficient is