Thermodynamics: Clausius-Clapeyron Equation
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Questions and Answers

What equation is associated with the slope of OA?

  • Van der Waal's Equation
  • Phase Rule Equation
  • Ideal Gas Equation
  • Clausius-Clapeyron Equation (correct)

Why is the slope of the freezing point curve negative?

  • Because the temperature of the system increases with pressure
  • Because the volume of ice is greater than that of water (correct)
  • Because the pressure of the system decreases with temperature
  • Because the volume of ice is less than that of water

What is the degree of freedom at the triple point of water?

  • Three
  • Zero (correct)
  • Two
  • One

What does the Clausius-Clapeyron equation describe?

<p>The relationship between pressure and temperature during phase transition (B)</p> Signup and view all the answers

How many phases of sulphur can coexist at equilibrium?

<p>Three (B)</p> Signup and view all the answers

What is the term for ∆H in the Clausius-Clapeyron equation?

<p>Enthalpy change (D)</p> Signup and view all the answers

What is the reason sulphur cannot coexist with all four phases at equilibrium?

<p>Because the degree of freedom of the system is negative (B)</p> Signup and view all the answers

How many possible combinations of three phases of sulphur can coexist at equilibrium?

<p>Four (C)</p> Signup and view all the answers

What is the significance of the slope of a vapour pressure curve?

<p>It indicates the change in enthalpy and volume (A)</p> Signup and view all the answers

What is the condition for the coexistence of different phases in a system?

<p>Equality of chemical potential (A)</p> Signup and view all the answers

What is the purpose of a phase diagram?

<p>To understand the effect of temperature, pressure, and composition on phase transitions (D)</p> Signup and view all the answers

What determines the sign of the slope of a vapour pressure curve?

<p>The ratio of enthalpy change to volume change (C)</p> Signup and view all the answers

What is the total number of restrictions imposed by the mole fraction condition?

<p>P (C)</p> Signup and view all the answers

What is the total number of restrictions imposed by the chemical equilibrium condition?

<p>C(P-1) (B)</p> Signup and view all the answers

What is the relationship between the number of phases (P) and the number of components (C) in a system according to the Gibbs phase rule?

<p>F = C - P + 2 (A)</p> Signup and view all the answers

What is the equation that relates the free energy of two phases in equilibrium at constant temperature?

<p>G1 = G2 (A)</p> Signup and view all the answers

What is the total number of variables in a system with P phases and C components?

<p>PC + 2 (C)</p> Signup and view all the answers

What is the total number of restrictions imposed by the equilibrium conditions in a system with P phases and C components?

<p>P + P(C-1) (C)</p> Signup and view all the answers

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