Question:
Which of the following symbols represents heat of reaction at constant pressure?
Which of the following symbols represents heat of reaction at constant pressure?
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Constant pressure → use enthalpy (\(\Delta H\)).
Updated On: May 4, 2026
- \(\Delta \text{H}\)
- \(\Delta S\)
- \(\Delta \text{U}\)
- \(\Delta G\)
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The Correct Option is A
Solution and Explanation
Concept:
At constant pressure: \[ q_p = \Delta H \]
Step 1: Understand symbols.
• \(\Delta H\) → Enthalpy change (heat at constant pressure)
• \(\Delta U\) → Internal energy
• \(\Delta S\) → Entropy
• \(\Delta G\) → Gibbs free energy Conclusion: \[ \text{Heat at constant pressure = } \Delta H \]
At constant pressure: \[ q_p = \Delta H \]
Step 1: Understand symbols.
• \(\Delta H\) → Enthalpy change (heat at constant pressure)
• \(\Delta U\) → Internal energy
• \(\Delta S\) → Entropy
• \(\Delta G\) → Gibbs free energy Conclusion: \[ \text{Heat at constant pressure = } \Delta H \]
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