### Related Questions

What is the correct answer?

4

# Heat is added at constant pressure in an ideal __________ cycle.

What is the correct answer?

4

# A reasonably general expression for vapourliquid phase equilibrium at low to moderate pressure is φ_{i} y_{i} P = Y_{i} x_{i}f_{i}° where, Φ is a vapor fugacity component, Y_{i} is the liquid activity co-efficient and f_{i}° is the fugacity of the pure component i. the K_{i} value (Y_{i} = K_{i} x_{i}) is therefore, in general a function of

B. Temperature and pressure only

C. Temperature, pressure and liquid composition x_{i} only

D. Temperature, pressure, liquid composition x_{i} and vapour composition yi

What is the correct answer?

4

# The reaction A (l) → R(g) is allowed to reach equilibrium conditions in an autoclave. At equilibrium, there are two phases, one a pure liquid phase of A and the other a vapor phase of A, R and S. Initially A alone is present. The numbers of degrees of freedom are:

What is the correct answer?

4

# Chemical engineering thermodynamics is concerned with the __________ in/of chemical processes.

C. Energy transformation from one form to another

What is the correct answer?

4

# Pick out the wrong statement.

A. Trouton's ratio of non-polar liquids is calculated using Kistyakowsky equation

B. Thermal efficiency of a Carnot engine is always less than 1

C. An equation relating pressure, volume and temperature of a gas is called ideal gas equation

What is the correct answer?

4

# The number of degrees of freedom for a mixture of ice and water (liquid) are

What is the correct answer?

4

# The chemical potential of a component (μi) of a phase is the amount by which its capacity for doing all work, barring work of expansion is increased per unit amount of substance added for an infinitesimal addition at constant temperature and pressure. It is given by

A. (∂E/∂n_{i})_{S, v, nj}

B. (∂G/∂n_{i})_{T, P, nj} = (∂A/∂ni) _{T, v, nj}

C. (∂H/∂n_{i})_{S, P, nj}

What is the correct answer?

4

# For an ideal liquid solution, which of the following is unity?

What is the correct answer?

4

# The relation connecting the fugacities of various components in a solution with one another and to composition at constant temperature and pressure is called the __________ equation.

What is the correct answer?

4

# All gases during throttling process at atmospheric temperature and pressure show a cooling effect except

What is the correct answer?

4

# The change in __________ is equal to the reversible work for compression in steady state flow process under isothermal condition.

What is the correct answer?

4

# Henry's law is closely obeyed by a gas, when its __________ is extremely high.

What is the correct answer?

4

# Throttling (Joule-Thomson effect) process is a constant __________ process.

What is the correct answer?

4

# For an irreversible process involving only pressure-volume work

What is the correct answer?

4

# Gibbs phase rule finds application, when heat transfer occurs by

What is the correct answer?

4

# Critical compressibility factor for all substances

A. Are more or less constant (vary from 0.2 to 0.3)

B. Vary as square of the absolute temperature

C. Vary as square of the absolute pressure

What is the correct answer?

4

# Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The ratio of chemical potential to free energy of a pure substance at constant temperature and pressure is

What is the correct answer?

4

# In any spontaneous process, the __________ free energy decreases.

What is the correct answer?

4

# Co-efficient of Performance (COP) of a refrigerator is the ratio of the

A. Work required to refrigeration obtained

B. Refrigeration obtained to the work required

C. Lower to higher temperature

D. Higher to lower temperature

What is the correct answer?

4

# For an ideal gas, the enthalpy

A. Increases with rise in pressure

B. Decreases with rise in pressure

C. Is independent of pressure

What is the correct answer?

4

# Reduced pressure of a gas is the ratio of its

A. Pressure to critical pressure

B. Critical pressure to pressure

C. Pressure to pseudocritical pressure

D. Pseudocritical pressure to pressure

What is the correct answer?

4

# In case of a close thermodynamic system, there is __________ across the boundaries.

A. No heat and mass transfer

B. No mass transfer but heat transfer

C. Mass and energy transfer

What is the correct answer?

4

# The number of degree of freedom for an Azeotropic mixture of ethanol and water in vapourliquid equilibrium, is

What is the correct answer?

4

# In a P-V diagram (for an ideal gas), an isothermal curve will coincide within adiabatic curve (through a point), when

What is the correct answer?

4

# On a P-V diagram of an ideal gas, suppose a reversible adiabatic line intersects a reversible isothermal line at point A. Then at a point A, the slope of the reversible adiabatic line (∂P/∂V)_{s} and the slope of the reversible isothermal line (∂P/ ∂V)_{T} are related as (where, y = C_{p}/C_{v})

A. (∂P/∂V)_{S} = (∂P/∂V)_{T}

B. (∂P/∂V)_{S} = [(∂P/∂V)_{T}]^{Y}

C. (∂P/∂V)_{S} = y(∂P/∂V)_{T}

D. (∂P/∂V)_{S} = 1/y(∂P/∂V)_{T}

What is the correct answer?

4

# High pressure steam is expanded adiabatically and reversibly through a well insulated turbine, which produces some shaft work. If the enthalpy change and entropy change across the turbine are represented by ΔH and ΔS respectively for this process:

What is the correct answer?

4

# The expression for entropy change given by, ΔS = nR ln (V_{2}/V_{1}) + nC_{v} ln (T_{2}/T_{1}) is valid for

A. Reversible isothermal volume change

B. Heating of a substance

C. Cooling of a substance

D. Simultaneous heating and expansion of an ideal gas

What is the correct answer?

4

# The partial molar enthalpy of a component in an ideal binary gas mixture of composition Z, at a temperature T and pressure P, is a function only of

What is the correct answer?

4

# The efficiency of an Otto engine compared to that of a diesel engine, for the same compression ratio will be

D. Data insufficient to predict

What is the correct answer?

4

# Free energy changes for two reaction mechanism 'X' and 'Y are respectively - 15 and - 5 units. It implies that X is

C. Three times slower than Y

D. Three times faster than Y