### Related Questions

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# Number of components (C), phase (P) and degrees of freedom (F) are related by Gibbs phase rule as

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4

# Third law of thermodynamics is concerned with the

A. Value of absolute entropy

C. Direction of energy transfer

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# Number of phases in a colloidal system is:

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

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# During a reversible isothermal expansion of an ideal gas, the entropy change is

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# Internal energy of an element at 1 atm and 25° C is __________ kcal/kg.mole.

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# A gas mixture of three components is brought in contact with a dispersion of an organic phase in water. The degree of freedom of the system is

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4

# All gases above its inversion temperature, in a throttling process will show

B. No change in temperature

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# The molar excess Gibbs free energy, g^{E}, for a binary liquid mixture at T and P is given by, (g^{E}/RT) = A . x_{1}. x_{2}, where A is a constant. The corresponding equation for ln y_{1}, where y_{1} is the activity co-efficient of component 1, is

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# Standard temperature and pressure (S.T.P.) is

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# Which of the following is not an intensive property?

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

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# Thermal efficiency of a Carnot engine can approach 100%, only when the temperature of the

A. Cold reservoir approaches zero

B. Hot reservoir approaches infinity

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# Fugacity co-efficient of a substance is the ratio of its fugacity to

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# Isotherm on an enthalpy-concentration diagram, for an ideal solution will be a

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# In the decomposition of PCl_{5} represented by, PCl_{5} PCl_{3} + Cl_{2}, decrease in the pressure of the system will __________ the degree of dissociation of PCl5.

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# The equation, (d log_{e} PA/d log_{e} xA) = (d log_{e} PA/d log_{e} xB) applicable to a binary solution of components. A and B in equilibrium with their vapors at constant temperature and pressure is called the __________ equation.

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# For a constant pressure reversible process, the enthalpy change (ΔH) of the system is

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# For the gaseous phase chemical reaction, C_{2}H_{4}(g) + H_{2}O(g) ↔ C_{2}H_{5}OH(g), the equilibrium conversion does not depend on the

A. Steam to ethylene ratio

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# If heat contents of CH_{4}, C_{2}H_{4} and C_{3}H_{8} are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH_{4}(g) + C_{2}H_{4}(g) C_{3}H_{8}(g) will be __________ Kcal.

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# Grams of butane (C_{4}H_{10}) formed by the liquefaction of 448 litres of the gas (measured at (STP) would be

D. Data insufficient; can't be computed

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4

# Heat of formation of an element in its standard state is

D. A function of pressure

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# Enthalpy of a gas depends upon its

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# What is the ratio of adiabatic compressibility to isothermal compressibility?

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# In case of steady flow compression polytropic process (PV^{n} = constant), the work done on air is the lowest, when

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# 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}

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# The unity of Planck's constant 'h' in the equation, E = hv is

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# For any system, what is the minimum number of degrees of freedom?

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# As the temperature is lowered towards the absolute zero, the value of the quantity (∂ΔF/∂T) approaches

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# The effect of changing the evaporator temperature on COP as compared to that of changing the condenser temperature (in vapour compression refrigeration system) is

D. Data insufficient, can't be predicted