In all forms of chemical bonds,the energy stored is chemical energy
Answer:
The correct answer is -2952 KJ/mol
Explanation:
Attached is the diagram for Born- Haber cycle. According to the cycle:
ΔHf= ΔH1 + ΔH2 + ΔH3 + ΔH4 + ΔH5 + LE
In order to calculate the lattice energy (LE):
LE= ΔHf - ΔH1 - ΔH2 - ΔH3 - ΔH4 - ΔH5
LE= -1123 KJ/mol - 148 KJ/mol - 159 KJ/mol - 728 KJ/mol - 1450 KJ/mol - (2 x (-328 KJ/mol)
LE= -2952 KJ/mol
Answer:
0.3758moles
Explanation:
moles of kcl = mass of kcl/ molar mass of kcl = 28/74.5 = 0.3758moles
Answer:
Mass = 23.95 g
Explanation:
Mass of iron = 16.7 g
Mass of iron(iii) oxide formed = ?
Solution:
Chemical equation:
Fe + 3O₂ → 2Fe₂O₃
Number of moles of iron:
Number of moles = mas/ molar mass
Number of moles = 16.7 g/ 55.85 g/mol
Number of moles = 0.3 mol
Now we will compare the moles of iron and iron oxide.
Fe : Fe₂O₃
4 : 2
0.3 : 2/4×0.3 = 0.15 mol
Mass of iron(iii) oxide:
Mass = number of moles × molar mass
Mass = 0.15 mol × 159.69 g/mol
Mass = 23.95 g
Answer:
chemical
Explanation:
because heat is being taken to the egg