Related Questions
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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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__________ decreases during adiabatic throttling of a perfect gas.
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In a P-V diagram (for an ideal gas), an isothermal curve will coincide within adiabatic curve (through a point), when
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__________ Equation predicts the activity coefficient from experimental data.
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For a given substance at a specified temperature, activity is __________ to fugacity.
B. Inversely proportional
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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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Compound having large heat of formation is
C. Not at all stable (like nascent O2)
D. Either more or less stable; depends on the compound
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The third law of thermodynamics states that the
A. Heat capacity of a crystalline solid is zero at absolute zero temperature
B. Heat transfer from low temperature to high temperature source is not possible without external work
C. Gases having same reduced properties behaves similarly
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Specific volume of an ideal gas is
B. The reciprocal of its density
C. Proportional to pressure
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Boiling of liquid is accompanied with increase in the
B. Specific Gibbs free energy
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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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There is a change in __________ during the phase transition.
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During the phase transition, __________ changes.
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Minimum number of phases that exists in a system is 1. Number of chemical species in a colloidal system is
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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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If an ideal solution is formed by mixing two pure liquids in any proportion, then the __________ of mixing is zero
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For the reversible exothermic reaction, N2 + 3H2 2NH3, increase of pressure would
A. Shift the equilibrium towards right
B. Give higher yield of NH3
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A thermodynamic system is taken from state A to B along ACB and is brought back to A along BDA as shown below in the P-V diagram. The net work done during the complete cycle is given by the area covered by
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Isobaric process means a constant process.
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Third law of thermodynamics is helpful in
A. Prediction of the extent of a chemical reaction
B. Calculating absolute entropies of substances at different temperature
C. Evaluating entropy changes of chemical reaction
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In a homogeneous solution, the fugacity of a component depends upon the
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Which of the following equations is obtained on combining 1st and 2nd law of thermodynamics, for a system of constant mass?
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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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At the absolute zero temperature, the entropy of every perfectly crystalline substance becomes zero. This follows from the
A. Third law of thermodynamics
B. Second law of thermodynamics
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For a multi-component system, the term chemical potential is equivalent to the
A. Molal concentration difference
C. Partial molar free energy
D. Molar free energy change
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For an exothermic reaction
A. Only enthalpy change (ΔH) is negative
B. Only internal energy change (ΔE) is negative
C. Both ΔH and ΔE are negative
D. Enthalpy change is zero
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Internal energy is equal to the heat absorbed in case of a/an __________ process.
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Efficiency of a Carnot engine working between temperatures T1 and T2 (T1 < T) is
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The change in __________ is equal to the reversible work for compression in steady state flow process under isothermal condition.
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What is the degree of freedom for two miscible (non-reacting) substances in vapor-liquid equilibrium forming an azeotrope?