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Chemistry Medium FPSC Uploaded: 04 Sep 2026

What is the standard enthalpy of formation of an element in its most stable state?

  • A Negative
  • B Zero
  • C Depends on the element
  • D One
Correct Answer: Option B — Zero
Explanation:
By convention, the standard enthalpy of formation for any element in its most stable physical state under standard conditions is defined as zero, serving as the reference point for thermodynamic calculations.
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