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Thermodynamics: Isobaric Process and Entropy

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Thermodynamics: Isobaric Process and Entropy

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Questions and Answers

What is the characteristic of an isobaric process?

Constant temperature

Constant pressure (correct)

Constant volume

Constant entropy

What is the derivative of the enthalpy (H) with respect to pressure (P) at constant temperature?

∂H/∂P = V

∂H/∂P = ∂G/∂P (correct)

∂H/∂P = -T(∂V/∂P)_T

∂H/∂P = 0

What is the entropy change for an isothermal and isobaric process?

ΔS = 0

ΔS = -Q/T

ΔS = Q/T (correct)

ΔS = ∞

What is the molar specific heat capacity of a super-cooled liquid water?

C_p Signup and view all the answers

What is the latent heat of fusion of water?

L = 334 J/g Signup and view all the answers

What is the sign of the entropy change during the fusion of super-cooled liquid to ice at 0°C?

Negative Signup and view all the answers

In an isochoric process, what is the value of dV?

0 Signup and view all the answers

In an isochoric process, what is the relationship between dQ and dU?

dQ = dU Signup and view all the answers

What is the expression for dS in an isochoric process?

dS = nC_v dT / T Signup and view all the answers

What is the expression for ∆S in an isochoric process, assuming C_v is independent of temperature?

∆S = nC_v In(T_2 / T_1) Signup and view all the answers

What is the assumption made in deriving the expression for ∆S in an isochoric process?

C_v is independent of temperature Signup and view all the answers

In an isochoric process, what is the relation between U and dQ?

dQ = dU Signup and view all the answers

What is the characteristic of a reversible process?

It follows the same path in both forward and backward directions Signup and view all the answers

What is the main difference between a reversible and an irreversible process?

The path followed by the process Signup and view all the answers

What is the significance of the area under the curve in a P-V diagram?

It represents the work done in the process Signup and view all the answers

What is the characteristic of a quasi-static process?

It requires an infinite time to complete Signup and view all the answers

What is the advantage of a reversible process in terms of work?

It provides maximum work Signup and view all the answers

What is the difference between a one-step and a two-step irreversible process?

The number of steps involved in the process Signup and view all the answers