22 Thermochemistry:MCQ2
14 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the primary factor that determines the heat change of a reaction, according to Hess's Law?

  • The route by which the reaction occurs
  • The catalyst used in the reaction
  • The temperature at which the reaction takes place
  • The initial and final states of the reaction (correct)

What is the purpose of isomerisation in improving the octane number of heptane?

  • To convert straight compounds to ring compounds
  • To break down large molecules into smaller ones
  • To form a more branched isomer (correct)
  • To produce hydrogen through electrolysis of water

What is the products of the steam reforming process?

  • CH₄ + H₂O
  • CO₂ + H₂O
  • CO₂ + H₂ (correct)
  • CO + 3H₂

What is the name of the process that involves breaking down large molecules into smaller ones with higher octane numbers?

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

What is the purpose of dehydrocyclisation in refining petroleum?

<p>To convert straight compounds to ring compounds (B)</p> Signup and view all the answers

What is the primary product of the electrolysis of water?

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

What is the name of the gas that is produced by steam reforming of methane?

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

What is the term for a reaction in which heat is given out?

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

What is the unit of measurement for the bond energy of a molecule?

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

What is the significance of the octane number of a fuel?

<p>It measures the tendency of a fuel to resist auto-ignition (C)</p> Signup and view all the answers

What is the heat of combustion of a substance?

<p>The heat change in kilojoules when one mole of a substance is completely burned in excess oxygen (C)</p> Signup and view all the answers

What is the Law of Conservation of Energy?

<p>Energy cannot be created or destroyed, but can change from one form to another (A)</p> Signup and view all the answers

What is the term for the heat of reaction of a chemical reaction?

<p>Heat of reaction (A)</p> Signup and view all the answers

What is the significance of 2,2,4-trimethylpentane in the octane scale?

<p>It is the standard for octane number 100 (C)</p> Signup and view all the answers

More Like This

Physical Chemistry Lecture 3
26 questions
Physical Chemistry Lecture 3
10 questions

Physical Chemistry Lecture 3

HandsDownTanzanite4090 avatar
HandsDownTanzanite4090
Use Quizgecko on...
Browser
Browser