11 Questions
What is the main principle of Hess's Law?
The heat change of a reaction depends only on the initial and final states of the reaction.
What is the purpose of improving the octane number of fuel?
To make the fuel more suitable for high compression engines.
What is the main product of electrolysis of water?
Hydrogen and oxygen.
What is the purpose of dehydrocyclisation in fuel refining?
To convert straight compounds into ring compounds.
What is the main purpose of catalytic cracking in fuel refining?
To break down large molecules into smaller ones with higher octane numbers.
What is the heat of reaction (H) of a chemical reaction?
The heat change in kilojoules when the number of moles of reactants indicated in the balanced equation describing the reaction react completely
What type of reaction is characterized by heat being given out?
Exothermic
What does the octane number measure?
The tendency of a fuel to resist auto-ignition
What is the Law of Conservation of Energy?
Energy cannot be created or destroyed, but can change from one form to another
What is the heat of formation of a substance?
The heat change in kilojoules when one mole of a substance is formed from its elements in their standard states
What is the kilogram calorific value of a substance?
The amount of heat energy produced per kg of fuel
Test your understanding of thermochemistry concepts, including exothermic and endothermic reactions, heat of reaction, and auto-ignition. Learn about the octane number and its significance in chemical reactions. Evaluate your knowledge of thermodynamic principles and their applications.
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