Chemical Engineering - MCQ Practice Questions

The partial molar Gibbs energy at infinite dilution gives the chemical potential μ. For a component in ideal solution:

In a throttling process (Joule-Thomson expansion), for an ideal gas:

The Maxwell relation derived from Gibbs free energy (G = H - TS) is:

For a non-ideal binary mixture, the activity coefficient (γᵢ) deviates from unity when:

The Clausius-Clapeyron equation relates vapor pressure to temperature. Which assumption is NOT required for its derivation?

The osmotic pressure of a dilute solution is given by van't Hoff equation: π = iMRT. What does 'i' represent?

When CO₂ gas at 1 atm is cooled below the sublimation temperature (~195 K), it directly converts to dry ice without passing through liquid phase. This phenomenon is explained by:

For a real gas obeying virial equation PV/nRT = 1 + B/V̄, the internal energy change with volume at constant T is:

In a Joule-Thomson expansion of real gas at 298 K, a positive μ_JT (inversion coefficient) means:

In a steam power plant, the Rankine cycle efficiency increases when:

The chemical potential μᵢ of a component in a mixture relates to partial molar properties by:

For a spontaneous process in an isolated system, the entropy production σ satisfies:

For a reversible process at constant T and P, the minimum work required (excluding PV work) is:

For a polytropic process PV^n = constant, if n = γ (heat capacity ratio), the process is:

An engineer needs to liquefy natural gas (primarily methane). The gas must be cooled below the inversion temperature because:

For a binary ideal solution at constant T and P, if we mix 1 mole of component A and 1 mole of component B, the entropy of mixing is:

In a desalination plant using reverse osmosis, work must be applied because: