Question: What is the change in enthalpy (ΔH) for an endothermic reaction?
Options:
ΔH < 0
ΔH = 0
ΔH > 0
ΔH = -RT
Correct Answer: ΔH > 0
Solution:
In an endothermic reaction, heat is absorbed from the surroundings, resulting in a positive change in enthalpy (ΔH > 0).
What is the change in enthalpy (ΔH) for an endothermic reaction?
Practice Questions
Q1
What is the change in enthalpy (ΔH) for an endothermic reaction?
ΔH < 0
ΔH = 0
ΔH > 0
ΔH = -RT
Questions & Step-by-Step Solutions
What is the change in enthalpy (ΔH) for an endothermic reaction?
Step 1: Understand what an endothermic reaction is. It is a type of chemical reaction that absorbs heat from its surroundings.
Step 2: Recognize that when heat is absorbed, the energy of the system increases.
Step 3: Learn about enthalpy (ΔH), which is a measure of the total energy of a system, including internal energy and the energy required to make room for it by displacing its environment.
Step 4: In an endothermic reaction, since heat is absorbed, the change in enthalpy (ΔH) is positive.
Step 5: Conclude that for an endothermic reaction, ΔH is greater than 0 (ΔH > 0).
Enthalpy Change – The change in enthalpy (ΔH) indicates whether a reaction absorbs or releases heat.
Endothermic Reactions – Endothermic reactions absorb heat, leading to a positive ΔH value.
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