Chemical Engineering Thermodynamics

131. Entropy of the system decreases, when

1. Snow melts into water
2. A gas expands spontaneously from high pressure to low pressure
3. Water is converted into ice
4. Both (B) & (C)

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132. Entropy, which is a measure of the disorder of a system, is:

1. Independent of pressure
2. Independent of temperature
3. Zero at absolute zero temperature for a perfect crystalline substance
4. All (A), (B) & (C)

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133. Equation which relates pressure, volume and temperature of a gas is called the

1. Equation of state
2. Gibbs Duhem equation
3. Ideal gas equation
4. None of these

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134. Equilibrium constant decreases as the temperature

1. Increases, for an exothermic reaction
2. Decreases, for an exothermic reaction
3. Increases, for an endothermic reaction
4. None of these

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135. Equilibrium constant of a reaction varies with the

1. Initial concentration of the reactant
2. Pressure
3. Temperature
4. None of these

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136. Extensive properties of a thermodynamic system depend upon the _________ of the system.

1. Specific volume
2. Temperature
3. Mass
4. Pressure

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137. Filling of gas from a high pressure cylinder into small bottles is an example of a/an _________ process.

1. Equilibrium
2. Adiabatic
3. Steady
4. Unsteady

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138. First law of thermodynamics deals with the

1. Direction of energy transfer
2. Reversible processes only
3. Irreversible processes only
4. None of these

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139. First law of thermodynamics is mathematically stated as

1. dQ = dE + dW
2. dQ = dE - dW
3. dE = dQ + dW
4. dW = dQ + dE

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

1. C_v.dT
2. C_p.dT
3. ∫ C_p.dT
4. ∫ C_v.dT

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