Answer:
755.625 kj
Explanation:
Given data:
Heat released by two mole of H₂ = 241.8 Kj
Heat released by 12.5 grams of H₂ = ?
Solution:
Number of moles of hydrogen:
Number of moles = mass/ molar mass
Number of moles = 12.5 g/ 2 g/mol
Number of moles = 6.25 mol
Chemical equation:
2H₂ + O₂ → 2H₂O + 241.8 kj
Now we will determine the heat released by 6.25 moles of hydrogen.
2 mole = 241.8 kj
1 mole =241.8 kj/2 = 120.9 kj
120.9 kj × 6.25 = 755.625 kj
