When 0.560 g of Na(s) reacts with excess F2(g) to form NaF(s), 13.8 kJ of heat is evolved at standard-state conditions. What is the standard enthalpy of formation (ΔH°f) of NaF(s)? Group of answer choices 24.8 kJ/mol -570 kJ/mol –7.8 kJ/mol 570 kJ/mol –24.8 kJ/mol

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When 0.560 g of Na(s) reacts with excess F2(g) to form NaF(s), 13.8 kJ of heat is evolved at standard-state conditions. What is the standard enthalpy of formation (ΔH°f) of NaF(s)?
Group of answer choices
24.8 kJ/mol
-570 kJ/mol
–7.8 kJ/mol
570 kJ/mol
–24.8 kJ/mol
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