Exams › GATE › Technical

The maximum theoretical work obtainable when a system interacts to equilibrium with a reference environment is called

1. Entropy
2. Enthalpy
3. Exergy
4. Rothalpy

Correct answer: Exergy

Solution

Exergy is the maximum useful work obtainable as a system comes to equilibrium with the reference environment. Entropy and enthalpy are state properties, while rothalpy is used in turbomachinery analysis.

Related GATE Technical questions

• A hydrocarbon \(C_nH_m\) is burnt in air \((O_2 + 3.78N_2)\). The stoichiometric fuel-to-air mass ratio for this process is: Note: Atomic weights of C and H are 12 and 1, respectively. Effective molecular weight of air is 28.8. Ignore any conversion of \(N_2\) in air to oxides of nitrogen (NO\(_x\)).
• Which one of the following statements is correct for a superheated vapour?
• During a non-flow thermodynamic process $(1\!\to\!2)$ executed by a perfect gas, the heat interaction is equal to the work interaction $(Q_{1-2}=W_{1-2})$ when the process is
• In which of the following pairs is the process isothermal?
• Superheated steam at 1500 kPa has a specific volume of 2.75 m³/kmol and compressibility factor \(Z\) of 0.95. The temperature of the steam is ____ °C (round off to the nearest integer).
• The fundamental thermodynamic relation is $dU = TdS + \tau\,dL$, where $T$ is the temperature and $\tau$ is the tension in the rubber band. Which one of the following relations is correct?

⚔️ Practice GATE Technical free + battle 1v1 →