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Thermodynamics for Chemical

The expression for entropy change given by, ΔS = – nR ln (P2/P1), holds good for___________________?

Thermodynamics for Chemical /
The expression for entropy change given by, ΔS = – nR ln (P2/P1), holds good for___________________?

A. Expansion of a real gas
B. Reversible isothermal volume change
C. Heating of an ideal gas
D. Cooling of a real gas

The expression for entropy change given by, ΔS = – nR ln (P2/P1), holds good for___________________? Read More »

Thermodynamics for Chemical

Which of the following is not a unit of the equilibrium constant Kp? (where, Δx = number of moles of products number of moles of reactants) ?

Thermodynamics for Chemical /
Which of the following is not a unit of the equilibrium constant Kp? (where, Δx = number of moles of products number of moles of reactants) ?

A. (atm)Δx, when Δx is negative
B. (atm)Δx, when Δx is positive
C. Dimensionless, when Δx = 0
D. (atm)Δx2, when Δx > 0

Which of the following is not a unit of the equilibrium constant Kp? (where, Δx = number of moles of products number of moles of reactants) ? Read More »

Thermodynamics for Chemical

Fugacity of a component in an ideal gas mixture is equal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at constant pressure and temperature ____________ as its mole fraction increases?

Thermodynamics for Chemical /
Fugacity of a component in an ideal gas mixture is equal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at constant pressure and temperature ____________ as its mole fraction increases?

A. Decreases
B. Decreases exponentially
C. Increases
D. Remain constant

Fugacity of a component in an ideal gas mixture is equal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at constant pressure and temperature ____________ as its mole fraction increases? Read More »

Thermodynamics for Chemical

Which of the following is a widely used refrigerant in vapour compression refrigeration system (using large centrifugal compressor) ?

Thermodynamics for Chemical /
Which of the following is a widely used refrigerant in vapour compression refrigeration system (using large centrifugal compressor) ?

A. Freon
B. Liquid sulphur dioxide
C. Methyl chloride
D. Ammonia

Which of the following is a widely used refrigerant in vapour compression refrigeration system (using large centrifugal compressor) ? Read More »

Thermodynamics for Chemical

In case of steady flow compression polytropic process (PVn = constant), the work done on air is the lowest, when_______________?

Thermodynamics for Chemical /
In case of steady flow compression polytropic process (PVn = constant), the work done on air is the lowest, when_______________?

A. n = y = 1.4
B. n = 0
C. n = 1
D. n = 1.66

In case of steady flow compression polytropic process (PVn = constant), the work done on air is the lowest, when_______________? Read More »

Thermodynamics for Chemical

The partial pressure of each constituent present in an alloy is _____________ the total vapor pressure exerted by the alloy?

Thermodynamics for Chemical /
The partial pressure of each constituent present in an alloy is _____________ the total vapor pressure exerted by the alloy?

A. Less than
B. Equal to
C. More than
D. Either B. or C; depends on the type of alloy

The partial pressure of each constituent present in an alloy is _____________ the total vapor pressure exerted by the alloy? Read More »

Thermodynamics for Chemical