A. Internal energy
B. Enthalpy
C. Entropy
D. All (A), B. & (C)
Correct Answer: Enthalpy ✔
Last Updated: July 28, 2023
Related MCQs
- Which of the following is not correct for a reversible adiabatic process ?
- Equation which relates pressure, volume and temperature of a gas is called the__________?
- At triple point (for one component system), vapour pressure of solid as compared to that of liquid will be__________?
- Mollier diagram is a plot of__________?
- The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called the __________ temperature?
- Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are__________?
- In a turbine, the fluid expands almost__________?
- The number of degrees of freedom at the triple point of water is__________?
- The chemical potential for a pure substance is __________ its partial molal free energy?
- A closed system is cooled reversibly from 100°C to 50°C. If no work is done on the system__________?
- Enthalpy ‘H’ is defined as__________?
- The Joule-Thomson co-efficient is defined as (∂T/∂P)H. Its value at the inversion point is__________?
- When a gas in a vessel expands, its internal energy decreases. The process involved is__________?
- For a single component two phase mixture, the number of independent variable properties are__________?
- Change of heat content when one mole of compound is burnt in oxygen at constant pressure is called the__________?
- What is the value of ln y (where y = activity co-efficient) for ideal gases ?
- What is the number of degree of freedom for a system of two miscible non-reacting species in vapor-liquid equilibrium forming an azeotrope ?
- In the ammonia synthesis reaction, N2 + 3H2 ⇌ 2NH3 + 22.4 kcal, the formation of NH3 will be favoured by__________?
- Grams of butane (C4H10) formed by the liquefaction of 448 litres of the gas (measured at (STP) would be__________?
- Joule-Thomson co-efficient for a perfect gas is__________?
- Tea kept in a thermos flask is vigorously shaken. If the tea is considered as a system, then its temperature will__________?
- The temperature at which both liquid and gas phases are identical, is called the __________ point?
- If an ideal solution is formed by mixing two pure liquids in any proportion, then the __________ of mixing is zero?
- Entropy is a/an__________?
- Isentropic process means a constant __________ process ?
- For an ideal solution, the value of activity co-efficient is__________?
- Pick out the wrong statement ?
- Heat pump__________?
- The equation Tds = dE – PdV applies to__________?
- Throttling (Joule-Thomson effect) process is a constant __________ process?
- What is the value of maximum COP in case of absorption refrigeration, if refrigeration provided is at temperature, TR (where, T1 and T2 are source & surrounding temperatures respectively.) ?
- Number of degrees of freedom for a three phase system in equilibrium comprising of three non-reacting chemical species is__________?
- Gibbs-Duhem equation__________?
- Entropy change of mixing two liquid substances depends upon the__________?
- Free energy change at equilibrium is__________?
- Extensive properties of a thermodynamic system depend upon the __________ of the system?
- In the reaction, represented by, 2SO2 + O2 ⇌ 2SO3; ΔH = – 42 kcal; the forward reaction will be favoured by__________?
- Chemical potential is a/an__________?
- __________ functions are exemplified by heat and work ?
- Domestic refrigerator usually works on the __________ refrigeration cycle?
- (1/V) (∂V/∂T)P is the mathematical expression__________?
- Lowering of condenser temperature (keeping the evaporator temperature constant) in case of vapour compression refrigeration system results in__________?
- In an isothermal process on an ideal gas, the pressure increases by 0.5 percent. The volume decreases by about __________ percent?
- COP of a refrigerator drawing 1 kW of power per ton of refrigeration is about__________?
- The unity of Planck’s constant ‘h’ in the equation, E = hv is__________?
- The value of gas constant ‘R’ is__________?
- When liquid and vapour phase of multi-component system are in equilibrium (at a given temperature and pressure), then chemical potential of each component is__________?
- Which is not a refrigerant ?
- Critical solution temperature (or the con-solute temperature) for partially miscible liquids (e.g., phenol-water) is the minimum temperature at which__________?
- Maxwell’s relation corresponding to the identity, dH = dS = Vdp + Σμi dni is__________?
- A system is said to be isopiestic, if there is no __________ change?