The number of degrees of freedom for a mixture of ice and water (liquid) are
Which of the following is not correct for a reversible adiabatic process ?
The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 - T2)/T1. The co-efficient of performance (C.O.P.) of a Carnot heat pump operating between T1 and T2 is given by
Which of the following is not an equation of state?
A gas shows deviation from ideal behaviour at
A cylinder containsgm of liquid oxygen. The volume occupied (in litres) by the oxygen, when it is released and brought to standard conditions (0°C,mm Hg) will be __________ litres.
In the equation PVn = constant, if the value of n = y = Cp/Cv, then it represents a reversible __________ process.
For an ideal gas, the chemical potential is given by
Variation of equilibrium pressure with temperature for any two phases of a given substances is given by the __________ equation.
Degree of freedom of a system consisting of a gaseous mixture of H2 and NH3 will be
Dryness fraction of wet steam is defined as the ratio of mass of vapour in the mixture to the mass of mixture __________ calorimeter is not used for measuring the dryness fraction of steam.
After throttling, gas temperature
Minimum number of phases that exists in a system isNumber of chemical species in a colloidal system is
Cp - Cv = R is valid for __________ gases.
Fugacity of a component in an ideal gas mixture is euqal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at contant pressure and temperature __________ as its mole fraction increases.
On opening the door of an operating refrigerator kept in a closed room, the temperature of the room will
Throttling (Joule-Thomson effect) process is a constant __________ process.
The difference between isothermal compressibility and adiabatic compressibility for an ideal gas is
Rotary lime kiln is an example of a/an __________ system.
With increase in temperature, the atomic heat capacities of all solid elements
Two substances are in equilibrium in a reversible chemical reaction. If the concentration of each substance is doubled, then the value of the equilibrium constant will be
Pick out the undesirable property for a good refrigerant.
On a P-V diagram of an ideal gas, suppose a reversible adiabatic line intersects a reversible isothermal line at point A. Then at a point A, the slope of the reversible adiabatic line (∂P/∂V)s and the slope of the reversible isothermal line (∂P/∂V)T are related as (where, y = Cp/Cv)
As the time is passing, entropy of the universe
Steam undergoes isentropic expansion in a turbine fromkPa and 400°C (entropy = 6.kJ/kg K) tokPa) (entropy of saturated liquid = 1.kJ/kg . K, entropy of saturated vapour = 7.kJ/kg. K) The exit condition of steam is
1m3 of an ideal gas atK andkPa expands reversibly to 5 times its initial volume in an insulated container. If the specific heat capacity (at constant pressure) of the gas isJ/mole . K, the final temperature will be
The chemical potential for a pure substance is __________ its partial molal free energy.
Henry's law is closely obeyed by a gas, when its __________ is extremely high.
The internal energy of a gas obeying P (V - b) RT (where, b is a positive constant and has a constant Cv), depends upon its
Heat requirement for decomposition of a compound into its elements is __________ that is evolved during the formation of that compound from its elements.
Entropy is a/an
Domestic refrigerator usually works on the __________ refrigeration cycle.
In a homogeneous solution, the fugacity of a component depends upon the
The second law of thermodynamics states that
The minimum number of phases that can exist in a system is
Choose the condition that must be specified in order to liquify CO2 (triple point for CO2 is - 57°C and 5.2 atm).
Equilibrium constant of a reaction varies with the
Heat of reaction is
The temperature at the eutectic point of the system is the __________ temperature that can be attained in the system.
The effect of changing the evaporator temperature on COP as compared to that of changing the condenser temperature (in vapour compression refrigeration system) is
Isotherm on an enthalpy-concentration diagram, for an ideal solution will be a
Which of the following processes can not be made reversible even under ideal condition of operation?
An isentropic process is carried out at constant
For a thermodynamic system containing 'x' chemical species, the maximum number of phases that can co-exist at equilibrium is
Fugacity and pressure are numerically not equal for the gases
"When a gas is expanded from high pressure region to low pressure region ; temper -ature change occurs". This phenomenon is related to the
The unit of equilibrium constant of a chemical reaction is the same as that of
At triple point (for one component system), vapour pressure of solid as compared to that of liquid will be
For an incompressible fluid, the __________ is a function of both pressure as well as temperature.
Internal energy of an ideal gas