# What is the standard enthalpy of formation of NaF

## Homework Statement

Please help! i just need to see one step by step solution of how to solve this problem and then I can figure the rest out.
When .560g 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 of NaF (s)?

## Homework Equations

(delta H=-569Kj/Mol)