Multiple Choice
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 ( H f) of NaF(s)
A) -570 kJ/mol
B) -24.8 kJ/mol
C) -7.8 kJ/mol
D) 24.8 kJ/mol
E) 570 kJ/mol
Correct Answer:

Verified
Correct Answer:
Verified
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