Question: What is the change in enthalpy for an endothermic reaction?
Options:
Negative
Positive
Zero
Undefined
Correct Answer: Positive
Solution:
In an endothermic reaction, heat is absorbed from the surroundings, resulting in a positive change in enthalpy.
What is the change in enthalpy for an endothermic reaction?
Practice Questions
Q1
What is the change in enthalpy for an endothermic reaction?
Negative
Positive
Zero
Undefined
Questions & Step-by-Step Solutions
What is the change in enthalpy for an endothermic reaction?
Correct Answer: Positive change in enthalpy
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: Know that enthalpy is a measure of the total energy of a system, including internal energy and the energy required to make room for it in the surroundings.
Step 4: Since the reaction absorbs heat, the change in enthalpy (ΔH) is positive.
Step 5: Conclude that for an endothermic reaction, the change in enthalpy is positive, indicating that energy is taken in.
Enthalpy Change – The change in enthalpy (ΔH) indicates whether a reaction absorbs or releases heat; endothermic reactions absorb heat, resulting in a positive ΔH.
Endothermic Reactions – Endothermic reactions are characterized by the absorption of heat from the surroundings, leading to an increase in enthalpy.
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