Chemical Engineering - MCQ Practice Questions

The Maxwell relations are derived from which mathematical principle?

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

The fugacity coefficient φ for a pure component relates to which thermodynamic property?

For a system at constant T and P, which statement about activity coefficient γ is true?

The Legendre transformation from U(S,V) to F(T,V) replaces which variable pair?

For an isothermal reversible expansion of 2 moles of ideal gas from 10 L to 50 L at 300 K:

The compressibility factor Z for a real gas at high pressure and low temperature typically shows:

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

The second law of thermodynamics can be expressed as:

For a binary ideal solution, the total vapor pressure at constant T is given by:

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:

A heat engine operating between 800 K and 300 K has actual efficiency of 40%. Its carnot efficiency is:

The Gibbs phase rule F = C - P + 2 indicates that for a binary system with 2 phases:

During a constant volume process, the first law of thermodynamics simplifies to:

The reduced temperature T_r and reduced pressure P_r are defined using critical point parameters. A substance at T_r = 0.9 and P_r = 2.0 is classified as:

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

A gas undergoes an isothermal expansion from 2 L to 5 L at 298 K. If the process is reversible, what is the sign of entropy change for an ideal gas?

In the van der Waals equation, the term 'a' represents:

What is the Clausius-Clapeyron equation used for?