Refrigeration capacity of a household refrigerator may be round about __________ tons.
The main feature of Carnot refrigeration cycle is that, it
When liquid and vapour phases of one component system are in equilibrium (at a given temperature and pressure), the molar free energy is
No work is done by the system, when a reaction occurs at constant
Pick out the correct statement:
In any spontaneous process,
Fundamental principle of refrigeration is based on the __________ law of thermodynamics.
For a spontaneous process, free energy
Boyle's law for gases states that
Internal energy change of a system over one complete cycle in a cyclic process is
The activity of an ideal gas is numerically __________ its pressure.
The four properties of a system viz. P, V, T, S are related by __________ equation.
Heat of reaction at constant volume is identified with __________ change.
If the vapour pressure at two temperatures of a solid phase in equilibrium with its liquid phase are known, then the latent heat of fusion can be calculated by the
1st law of thermodynamics is nothing but the law of conservation of
Which of the following is a thermodynamic property of a system ?
Heating of water under atmospheric pressure is an __________ process.
The melting point of paraffin wax (which contracts on solidification) __________ with pressure rise.
What is the value of ln y (where y = activity co-efficient) for ideal gases ?
When a gas in a vessel expands, its internal energy decreases. The process involved is
Lowering of condenser temperature (keeping the evaporator temperature constant) in case of vapour compression refrigeration system results in
If the pressure onc.c. of air is halved, then its volume (at the same temperature) would be __________ c.c.
Which of the following diagrams does not represent an Otto cycle ?
Chemical potential is a/an
In the decomposition of PCl5 represented by, PCl5 PCl3 + Cl2, decrease in the pressure of the system will __________ the degree of dissociation of PCl5.
The freezing point of a liquid decreases when the pressure is increased, if the liquid __________ while freezing.
Van Laar equation deals with the activity co-efficients in
Specific heat of a gas for a reversible adiabatic process is
Co-efficient of Performance (COP) of a refrigerator is the ratio of the
The number of degrees of freedom for an azeotropic mixture in a two component vapour-liquid equilibria is/are
A closed system is cooled reversibly from 100°C to 50°C. If no work is done on the system
A system is said to be isopiestic, if there is no __________ change.
Pick out the wrong statement.
The principle applied in liquefaction of gases is
Melting of ice exemplifies a/an
Which of the following is not a reversible process ?
In polytropic process (PVn = constant), if n =it means a/an __________ process.
High __________ is an undesirable property for a good refrigerant.
Fugacity is most helpful in
Any substance above its critical temperature exists as
Work done in an adiabatic process between two states depends on the
Which is not a refrigerant ?
In a turbine, the fluid expands almost
Grams of butane (C4H10) formed by the liquefaction oflitres of the gas (measured at (STP) would be
The thermodynamic law, PVy = constant, is not applicable in case of
Partial molar free energy of an element A in solution is same as its
A refrigeration cycle is the same as a __________ cycle,
At __________ point, all the three phases (i.e.solid, liquid and gas) co-exist.