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CHEMISTRY. PLEASE HELP!! Which statement about delta Hf 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.

Daniel King

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James Washington on June 17, 2018

Answer;C) is negative when a compound forms from the elements in their standard states.Explanation;-Delta Hf is the heat of formation, when a substance or a compound is formed from its constituent elements. Delta Hf or enthalpy of formation refers to the change in enthalpy when one mole of a substance in the standard state is formed from its pure elements under the same conditions. -Delta Hf help in the understanding of the energy transfer during chemical reactions. Delta Hf is negative when a compound forms from the elements in their standard states.


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