Related Questions
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In case of steady flow compression polytropic process (PVn = constant), the work done on air is the lowest, when
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Which of the following is a thermodynamic property of a system?
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__________ functions are exemplified by heat and work.
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As the entropy of the universe is increasing, day by day, the work producing capacity of a heat engine is
D. Data sufficient, can't be predicted
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Which of the following is affected by the temperature?
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An ideal monatomic gas is taken round the cycle ABCDA as shown below in the P-V diagram. The work done during the cycle is
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Which of the following is not an intensive property?
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Equilibrium constant of a reaction varies with the
A. Initial concentration of the reactant
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The fugacity of a gas in a mixture is equal to the product of its mole fraction and its fugacity in the pure state at the total pressure of the mixture. This is
A. The statement as per Gibbs-Helmholtz
B. Called Lewis-Randall rule
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PVy = constant, holds good for an isentropic process, which is
A. Reversible and isothermal
B. Isothermal and irreversible
C. Reversible and adiabatic
D. Adiabatic and irreversible
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The entropy change in a reversible isothermal process, when an ideal gas expands to four times its initial volume is
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The enthalpy change when ammonia gas is dissolved in water is called the heat of
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At a given temperature, the volume of a gas dissolved in a solvent __________ with increase in pressure.
D. May increase or decrease; depends on the gas
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Free energy change at equilibrium is
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Which is a state function?
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The difference between isothermal compressibility and adiabatic compressibility for an ideal gas is
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Which of the following is not an intensive property?
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Which of the following units is not present in both the vapor compression refrigeration system and absorption refrigeration system?
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Pick out the correct statement.
A. Entropy and enthalpy are path functions
B. In a closed system, the energy can be exchanged with the surrounding, while matter cannot be exchanged
C. All the natural processes are reversible in nature
D. Work is a state function
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A solid metallic block weighing 5 kg has an initial temperature of 500°C. 40 kg of water initially at 25°C is contained in a perfectly insulated tank. The metallic block is brought into contact with water. Both of them come to equilibrium. Specific heat of block material is 0.4 kJ.kg-1. K-1. Ignoring the effect of expansion and contraction and also the heat capacity to tank, the total entropy change in kJ.kg-1, K-1 is
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Measurement of thermodynamic property of temperature is facilitated by __________ law of thermodynamics.
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Which of the following identities can be most easily used to verify steam table data for superheated steam?
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In a homogeneous solution, the activity coefficient of a component depends upon the
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A system is said to be isopiestic, if there is no __________ change.
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In polytropic process (PVn = constant), if n = 1; it means a/an __________ process.
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The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called __________ temperature.
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The effect of changing the evaporator temperature on COP as compared to that of changing the condenser temperature (in vapour compression refrigeration system) is
D. Data insufficient, can't be predicted
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Efficiency of a Carnot engine working between temperatures T1 and T2 (T1 < T) is
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The heat capacities for the ideal gas state depend upon the
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Gibbs-Duhem equation relates composition in liquid phase and the __________ at constant temperature & pressure.