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Chemical Engineering Thermodynamics

Chemical Engineering Thermodynamics
A cyclic engine exchanges heat with two reservoirs maintained at 100 and 300°C respectively. The maximum work (in J) that can be obtained from 1000 J of heat extracted from the hot reservoir is

651
667
349
1000

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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

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

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Chemical Engineering Thermodynamics
First law of thermodynamics is mathematically stated as

dQ = dE + dW
dQ = dE - dW
dE = dQ + dW
dW = dQ + dE

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Chemical Engineering Thermodynamics
Maximum work that could be secured by expanding the gas over a given pressure range is the __________ work.

Isentropic
None of these
Adiabatic
Isothermal

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Chemical Engineering Thermodynamics
Generation of heat by friction is an example of a/an __________ change.

Isothermal
Adiabatic
Reversible
Irreversible

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Chemical Engineering Thermodynamics
For a thermodynamic system containing 'x' chemical species, the maximum number of phases that can co-exist at equilibrium is

X + 3
X + 2
X + 1
X

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