When 1.42g of iron reacts with 1.80g of chlorine, 3.22g of fecl2(s) and 8.60kj of heat is produced. what is the enthalpy change for the reaction when 1 mole of fecl2(s) is produced.

ΔH for 1 mole of FeCl2 is -338.58 kJ/mol

Explanation:

Step 1: Data given

Mass of iron = 1.42 grams

Mass of chlorine = 1.80 grams

Mass of FeCl2 = 3.22 grams

Heat produced = 8.60 kJ (ΔH = -8.60 kJ because the reaction is exothermic)

Molar mass of Fe = 55.845 g/mol

Molar mass of Cl2 = 70.9 g/mol

Molar mass of FeCl2 = 126.75 g/mol

Step 2: The balanced equation

Fe + Cl2 → FeCl2

Step 3: Calculate moles of FeCl2

Moles FeCl2 = Mass FeCl2 / Molar mass FeCL2

Moles FeCl2 = 3.22 grams / 126.75 g/mol

Moles FeCl2 = 0.0254 moles

Step 4: Calculate the enthalpy change for 1 mole of FeCl2

For 0.0254 moles of FeCl2 ΔH is -8.60 kJ

For 1 mole of FeCL2 ΔH = -8.60 / 0.0254mol = -338.58 kJ/mol

ΔH for 1 mole of FeCl2 is -338.58 kJ/mol

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )