Calculate the H 0rxn for H2 (g) +F2 (g) ---> 2HF (g). A)-271.6 kJ/mol B)-543.2 k

Question

Calculate the H0rxn for H2 (g) +F2 (g) ---> 2HF (g). A)-271.6 kJ/mol B)-543.2 kJ/mol C)+271.6 kJ/mol D)0 kJ/mol E)-135.8 kJ/mol (My guess is that the answer is zero..... but I might be wrongbecause the products are not in their standard state. Or arethey???) I do not know what the right answer is at themoment. Thanks for your help!) Calculate the H0rxn for H2 (g) +F2 (g) ---> 2HF (g). A)-271.6 kJ/mol B)-543.2 kJ/mol C)+271.6 kJ/mol D)0 kJ/mol E)-135.8 kJ/mol (My guess is that the answer is zero..... but I might be wrongbecause the products are not in their standard state. Or arethey???) I do not know what the right answer is at themoment. Thanks for your help!) Calculate the H0rxn for H2 (g) +F2 (g) ---> 2HF (g). A)-271.6 kJ/mol B)-543.2 kJ/mol C)+271.6 kJ/mol D)0 kJ/mol E)-135.8 kJ/mol (My guess is that the answer is zero..... but I might be wrongbecause the products are not in their standard state. Or arethey???) I do not know what the right answer is at themoment. Thanks for your help!)

Explanation / Answer

The standard heat of the reaction H0 = 2HHF0-HH20-HF20 H0 = 2(-268.6kJ/mol) - 0 -0        ( according to thetables in the appendix of my Chang's Chemistry ) H0 =-537.2 kJ The nearest one isB H0 = 2(-268.6kJ/mol) - 0 -0        ( according to thetables in the appendix of my Chang's Chemistry ) H0 =-537.2 kJ The nearest one isB

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