Module 15: Second Law of Thermodynamics

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Questions and Answers

Which law is based on the principle that 'heat does not spontaneously flow from a colder body to a hotter body'?

  • First Law of Thermodynamics
  • Second Law of Thermodynamics (correct)
  • Third Law of Thermodynamics
  • Zeroth Law of Thermodynamics

What does entropy measure in a substance?

  • Volume
  • Temperature
  • Degree of randomness (correct)
  • Pressure

In which state of matter is entropy typically the highest?

  • Solids
  • Aqueous ions
  • Liquids
  • Gases (correct)

When does a positive change in entropy occur?

<p>Solid reactants form liquid or gaseous products (C)</p> Signup and view all the answers

Which type of reaction often results in a decrease in entropy?

<p>Gasous reactants form solid products (B)</p> Signup and view all the answers

What happens to energy according to the Second Law of Thermodynamics?

<p>Energy is transformed, and more and more of it is wasted over time (B)</p> Signup and view all the answers

Which property is a measure of the disorder present in a substance or system?

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

In the context of reactions, what does it mean if a reaction is classified as endothermic?

<p>It absorbs heat (B)</p> Signup and view all the answers

What is the minimum work required to carry out a nonspontaneous process in terms of Gibbs Free Energy?

<p>ΔG &gt; 0 (A)</p> Signup and view all the answers

Which term represents the free energy change when a compound is formed from its elements in their most thermodynamically stable states at standard state conditions?

<p>Standard Free Energy of Formation (D)</p> Signup and view all the answers

What is the sign convention for Gibbs Free Energy change (ΔG) in an exergonic reaction?

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

Which of the following is true about reversible reactions?

<p>They reach equilibrium where reactant and product concentrations stabilize (C)</p> Signup and view all the answers

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