Question: In an exothermic reaction, what happens to the enthalpy of the system?
Options:
It increases.
It decreases.
It remains constant.
It becomes zero.
Correct Answer: It decreases.
Solution:
In an exothermic reaction, the system releases heat, resulting in a decrease in enthalpy (ΔH < 0).
In an exothermic reaction, what happens to the enthalpy of the system?
Practice Questions
Q1
In an exothermic reaction, what happens to the enthalpy of the system?
It increases.
It decreases.
It remains constant.
It becomes zero.
Questions & Step-by-Step Solutions
In an exothermic reaction, what happens to the enthalpy of the system?
Step 1: Understand what an exothermic reaction is. It is a type of chemical reaction that releases heat to the surroundings.
Step 2: Recognize that when heat is released, the energy of the system decreases.
Step 3: Know that enthalpy (ΔH) is a measure of the total energy of a system, including heat content.
Step 4: Since the system is losing heat in an exothermic reaction, the enthalpy of the system decreases.
Step 5: Conclude that in an exothermic reaction, the change in enthalpy (ΔH) is less than zero (ΔH < 0).
Exothermic Reaction – An exothermic reaction is a chemical reaction that releases heat to its surroundings, leading to a decrease in the enthalpy of the system.
Enthalpy Change (ΔH) – Enthalpy change (ΔH) is a measure of the heat content of a system, and in exothermic reactions, ΔH is negative (ΔH < 0).
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