For a system at equilibrium, the chemical potential of a substance in different phases must be:
What does the Gibbs free energy criterion ΔG < 0 indicate for a process?
The work done by a system during expansion against constant external pressure P_ext is:
In a throttling process (Joule-Thomson expansion), which property remains constant?
For a spontaneous adiabatic process in an isolated system, entropy must:
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The Maxwell relation derived from dG = -SdT + VdP is:
In an adiabatic compression process for an ideal gas, which statement is correct?
The Joule-Thomson coefficient μ_JT is negative for most gases at room temperature. This means:
For a binary ideal solution, Raoult's law states that:
A system absorbs 500 J of heat and does 300 J of work. The change in internal energy is:
The compressibility factor Z for a real gas at high pressures is typically:
For a constant pressure process, the heat absorbed equals:
A reversible process between two states A and B will have entropy change:
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:
