Enthalpy of Formation Video Lessons

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Problem: Which statement about ΔHf is true?A. It is zero for any compound in its standard state.B. It is positive when the bonds of the product store more energy than those of the reactants.C. It is negative when a compound forms from elements in their standard states.D. It is zero for any element that is in the liquid state.

FREE Expert Solution

Recall the definition of enthalpy

  • amount of energy within a substance that is available for conversion to heat 
  • property of a thermodynamic system


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Problem Details

Which statement about ΔHf is true?

A. It is zero for any compound in its standard state.

B. It is positive when the bonds of the product store more energy than those of the reactants.

C. It is negative when a compound forms from elements in their standard states.

D. It is zero for any element that is in the liquid state.

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