5.1.2 Examples of exothermic reactions: combustion, oxidati

• What are exothermic reactions?

  Chemical reactions that release heat energy
• What happens to the surroundings during combustion?

  They become warmer
• How does burning wood illustrate an exothermic reaction?

  It releases heat and light into the surroundings
• What type of process is oxidation?

  It is an exothermic process
• What are the reactants in a neutralization reaction?

  • Acid
  • Base
• What is the significance of heat being released during neutralization?

  It indicates the reaction is exothermic
• What happens to the surroundings during exothermic reactions?

  The surroundings become warmer
• What type of reaction is neutralization?

  Exothermic reaction
• What is the increase in O.N. (Oxidation Number) in the given reaction?

  3
• What is produced when propane gas burns?

  Heat is released when propane combines with oxygen
• How does the oxidation number of nitrogen change in the reaction?

  It increases from -3 to 0
• What is oxidation in chemistry?

  A reaction gaining oxygen or losing electrons
• What is combustion?

  A rapid chemical reaction with oxygen
• What happens to Cu²+ in the reaction with NH₃?

  Cu²+ gains electrons (reduction)
• What type of reaction is combustion?

  Exothermic reaction
• What is the reaction between acetic acid and baking soda?

  Sodium acetate, water, and carbon dioxide are produced
• What does combustion release?

  Heat and light
• What are the characteristics of oxidation?

  • Gains oxygen
  • Loses electrons
  • Releases heat
  • Exothermic reaction
• What are the products of a neutralization reaction?

  Salt and water
• What is the definition of neutralization?

  A reaction between an acid and a base
• What are the characteristics of combustion as a reaction type?

  • Oxygen Involved: Yes
  • Heat Released: High
  • Light Released: High
  • Exothermic: Yes
• What happens when baking soda is added to vinegar?

  • A neutralization reaction occurs
  • Produces salt and water
  • Releases heat and causes fizzing
• What happens to N³⁻ in the reaction with NH₃?

  N³⁻ loses electrons (oxidation)
• What is the general equation for a neutralization reaction?

  • Acid + Base → Salt + Water
• What is combustion?

  A chemical reaction that releases heat
• What type of reaction is combustion classified as?

  Combustion is an exothermic reaction
• What is the general outcome of combustion reactions?

  They release heat energy
• What is the reaction between sulfuric acid and potassium hydroxide?

  Potassium sulfate and water are produced
• What happens when wood burns in combustion?

  Wood reacts with oxygen, producing heat and light
• What is the chemical equation for the reaction between acetic acid and baking soda?

  $CH_{3}COOH +$$NaHCO_{3} \rightarrow CH_{3}COONa +$$H_{2}O +$$CO_{2}$
• What are the changes in oxidation numbers in the given reaction?

  • Increase in O.N. = 3
  • Decrease in O.N. = 2
• How does the rusting of iron exemplify oxidation?

  It shows iron gaining oxygen and losing electrons
• What does a neutralization reaction release?

  Heat
• What are the products in the given reaction?

  Cu + N2 + H2O
• Why are combustion reactions considered exothermic?

  They release heat energy by forming stronger bonds
• What is the reaction between hydrochloric acid and sodium hydroxide?

  Sodium chloride and water are produced
• What type of process is the reaction between acetic acid and baking soda?

  It is an exothermic process
• What occurs during oxidation that makes it exothermic?

  Electrons are lost, releasing energy as heat
• What is the decrease in O.N. (Oxidation Number) in the given reaction?

  2
• What does vinegar do to baking soda in a neutralization reaction?

  It neutralizes the baking soda