What is the correct answer?


What is the value of ln y (where y = activity co-efficient) for ideal gases?

A. Zero

B. Unity

C. Infinity

D. Negative

Correct Answer :

A. Zero

Related Questions

The expression for entropy change given by, ΔS = - nR ln (P2/P1),… The chemical potential of a component (μi) of a phase is the amount… In polytropic process (PVn = constant), if n = 1; it means a/an __________… Out of the following refrigeration cycles, which one has the minimum COP… Which of the following is true for Virial equation of state? Entropy, which is a measure of the disorder of a system, is: If the heat of solution of an ideal gas in a liquid is negative, then… Which of the following is not an extensive property? Compressibility factor for almost all the gases are approximately same… High __________ is an undesirable property for a good refrigerant. The intensive properties are Which of the following is affected by the temperature? Absolute zero temperature signifies the When dilute aqueous solutions of two salts are mixed, the process is associated… In which of the following reaction equilibrium, the value of equilibrium… Entropy change for an irreversible process taking system and surrounding… Refrigeration cycle During Joule-Thomson expansion of gases First law of thermodynamics is mathematically stated as Third law of thermodynamics is concerned with the Helmholtz free energy (A) is defined as Pick out the wrong statement. Which is not a refrigerant? Normal temperature and pressure (N.T.P.) corresponds to For a reversible process involving only pressure-volume work Vapour which is at a pressure smaller than the saturation pressure for… The theoretical minimum work required to separate one mole of a liquid… In case of vapour compression refrigeration system, elevating the evaporator… Which of the following non-flow reversible compression processes require… Cv is given by