In which type of reaction is the change in enthalpy equal to the heat absorbed o

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Question: In which type of reaction is the change in enthalpy equal to the heat absorbed or released at constant pressure?

Options:

Correct Answer: Endothermic reaction

Solution:

In an endothermic reaction, the change in enthalpy is equal to the heat absorbed at constant pressure.

In which type of reaction is the change in enthalpy equal to the heat absorbed or released at constant pressure?

In which type of reaction is the change in enthalpy equal to the heat absorbed or released at constant pressure?

Step 1: Understand what enthalpy is. Enthalpy is a measure of energy in a system, often related to heat.
Step 2: Know that reactions can either absorb heat or release heat.
Step 3: Identify the two types of reactions: endothermic (absorbs heat) and exothermic (releases heat).
Step 4: Remember that at constant pressure, the change in enthalpy (ΔH) is equal to the heat (q) absorbed or released.
Step 5: Conclude that in an endothermic reaction, the change in enthalpy is equal to the heat absorbed.

Enthalpy Change – The change in enthalpy (ΔH) represents the heat absorbed or released during a reaction at constant pressure.
Endothermic vs Exothermic Reactions – Endothermic reactions absorb heat (ΔH > 0), while exothermic reactions release heat (ΔH < 0).
Constant Pressure Conditions – The definition of enthalpy change applies specifically under constant pressure conditions, which is a common scenario in chemical reactions.