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Which of the following is true about exothermic reactions? (2022)

Practice Questions

Q1
Which of the following is true about exothermic reactions? (2022)
  1. They absorb heat.
  2. They release heat.
  3. They have a positive ΔH.
  4. They are always spontaneous.

Questions & Step-by-Step Solutions

Which of the following is true about exothermic reactions? (2022)
  • Step 1: Understand what an exothermic reaction is. It is a type of chemical reaction that releases heat.
  • Step 2: Recognize that when heat is released, the temperature of the surroundings increases.
  • Step 3: Learn about enthalpy, which is a measure of heat content in a system.
  • Step 4: In exothermic reactions, the change in enthalpy (ΔH) is negative, meaning the system loses heat.
  • Step 5: Conclude that exothermic reactions are characterized by the release of heat and a negative ΔH.
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