Related Questions
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For a real gas, the chemical potential is given by
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Heat is added at constant temperature in an ideal __________ cycle.
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Entropy change of the reaction, H2O (liquid) → H2O (gas), is termed as the enthalpy of
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In a homogeneous solution, the fugacity of a component depends upon the
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A system is said to be at equilibrium, if the entropy of the system has reached __________ value.
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A refrigeration cycle is a reversed heat engine. Which of the following has the maximum value of the co-efficient of performance (COP) for a given refrigeration effect?
A. Vapor compression cycle using expansion valve
B. Air refrigeration cycle
C. Vapor compression cycle using expansion engine
D. Carnot refrigeration cycle
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The enthalpy change when ammonia gas is dissolved in water is called the heat of
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Degree of freedom of a system consisting of a gaseous mixture of H2 and NH3 will be
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Equation which relates pressure, volume and temperature of a gas is called the
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Which of the following is not affected by temperature changes?
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For an ideal solution, the value of activity co-efficient is
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For a thermodynamic system containing 'x' chemical species, the maximum number of phases that can co-exist at equilibrium is
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Chemical engineering thermodynamics is concerned with the __________ in/of chemical processes.
C. Energy transformation from one form to another
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The activity of an ideal gas is numerically __________ its pressure.
D. Data insufficient, can't be predicted
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If the internal energy of an ideal gas decreases by the same amount as the work done by the system, then the
A. Process must be isobaric
B. Temperature must decrease
C. Process must be adiabatic
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Gibbs free energy at constant pressure and temperature under equilibrium conditions is
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If the molar heat capacities (Cp or Cv) of the reactants and products of a chemical reaction are identical, then, with the increase in temperature, the heat of reaction will
D. Increase or decrease; depends on the particular reaction
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With increase in compression ratio, the efficiency of the otto engine
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Joule-Thomson co-efficient which is defined as, η = (∂T/∂P)H = 1/Cp (∂H/∂T)P, changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is
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As pressure approaches zero, the ratio of fugacity to pressure (f/P) for a gas approaches
D. An indeterminate value
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A Carnot cycle consists of the following steps:
A. Two isothermal and two isentropic
B. Two isobaric and two isothermal
C. Two isochoric and two isobaric
D. Two isothermals and two isochoric
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Charles' law for gases states that
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Choose the condition that must be specified in order to liquify CO2 (triple point for CO2 is - 57°C and 5.2 atm).
A. Pressure must be kept below 5.2 atm
B. Temperature must be kept above - 57°C
C. Pressure must be kept below 5.2 atm. and temperature must be kept above 57°C
D. Pressure and temperature must be kept below 5.2 atm. and - 57°C respectively
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The melting point of paraffin wax (which contracts on solidification) __________ with pressure rise.
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On opening the door of an operating refrigerator kept in a closed room, the temperature of the room will
D. Increase in summer and will decrease in winter
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The ammonia synthesis reaction represented by N2 + 3H2 2NH3; ΔH = - 22.4 kcal, is
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The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances. This is the
B. Statement of Van't Hoff Equation
C. Le-Chatelier's principle
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It is desired to bring about a certain change in the state of a system by performing work on the system under adiabatic conditions.
A. The amount of work needed is path dependent
B. Work alone cannot bring out such a change of state
C. The amount of work needed is independent of path
D. More information is needed to conclude anything about the path dependence or otherwise of the work needed
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The expression for the work done for a reversible polytropic process can be used to obtain the expression for work done for all processes, except reversible __________ process.
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What is the number of degree of freedom for a system of two miscible non-reacting species in vapor-liquid equilibrium forming an azeotrope?