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Chemical Engineering Thermodynamics

Chemical Engineering Thermodynamics
The temperature at the eutectic point of the system is the __________ temperature that can be attained in the system.

Average
Highest
None of these
Lowest

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Chemical Engineering Thermodynamics
The total change in the enthalpy of a system is independent of the

Pressure and temperature
State of combination and aggregation in the beginning and at the end of the reaction
None of these
Number of intermediate chemical reactions involved

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Chemical Engineering Thermodynamics
A two stage compressor is used to compress an ideal gas. The gas is cooled to the initial temperature after each stage. The intermediate pressure for the minimum total work requirement should be equal to the __________ mean of P₁ and P₂.(where, P₁ and P₂ are initial and final pressures respectively)

Arithmetic
Logarithmic
Harmonic
Geometric

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Chemical Engineering Thermodynamics
In case of vapour compression refrigeration system, elevating the evaporator temperature (keeping the condenser temperature constant) results in

Enhanced COP
Increased or decreased COP ; depending upon the type of refrigerant
No change in the value of COP
Decreased COP

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Chemical Engineering Thermodynamics
The molar excess Gibbs free energy, gE, for a binary liquid mixture at T and P is given by, (gE/RT) = A . x₁. x₂, where A is a constant. The corresponding equation for ln y₁, where y₁ is the activity co-efficient of component 1, is

Ax₁²
A . x₂²
Ax₂
Ax₁

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Chemical Engineering Thermodynamics
Claude gas liquefaction process employs cooling

None of these
By throttling
At constant pressure
By expansion in an engine

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