Chemical Engineering - MCQ Practice Questions

Which thermodynamic potential is most useful for constant temperature and pressure processes?

For an ideal gas undergoing isothermal expansion, the work done is given by:

For a process where ΔG < 0 at all temperatures, the process must be:

The heat of vaporization of water is 40.66 kJ/mol at 373 K. The entropy of vaporization is approximately:

For a reversible process, the Clausius inequality states:

A cyclic heat engine operates between hot reservoir at 500 K and cold reservoir at 300 K. Maximum theoretical efficiency is:

The heat capacity at constant pressure Cₚ is always greater than heat capacity at constant volume Cᵥ because:

For a real gas with van der Waals equation, the constants 'a' and 'b' represent:

For a spontaneous process at constant T and P, which condition must be satisfied?

A reversible adiabatic process for an ideal gas follows PVᵞ = constant. If γ = 1.4 and initial pressure is 1 atm with volume 1 L, what is the final pressure when volume becomes 0.5 L?

The Helmholtz free energy (A = U - TS) is the maximum useful work available at:

For a van der Waals gas, the critical compressibility factor (Z_c) is approximately:

For an open system, the steady flow energy equation relates enthalpy rather than internal energy because:

When 100 g of ice at 0°C melts to water at 0°C at 1 atm, the entropy change is approximately (ΔH_fus = 334 J/g):

The fugacity coefficient (φ) for an ideal gas is:

For a spontaneous process occurring at constant temperature and pressure, which condition must be satisfied?

A throttle valve is used in a refrigeration cycle. This is an example of a(n) _____ process.

A gas mixture at 298 K contains H₂ and N₂. If the mixture obeys Amagat's law and the partial volumes are equal, what is the mole fraction of H₂?

At the critical point of a substance, which of the following is true?

For an ideal gas undergoing isothermal expansion from V₁ to V₂, the entropy change is: