11th Class Chemistry Thermodynamics / रासायनिक उष्मागतिकी Question Bank 11th CBSE Chemistry Thermodynamics

  • question_answer
    Why is standard heat of formation of diamond not zero although it is an element?

    Answer:

                    Out of the various allotropic forms of an element, only the standard heat of formation of the most stable allotropic form is taken as zero. Since graphite and not diamond is the most stable form of carbon, therefore the enthalpy of formation of diamond is not zero.


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