1)When Fe(s) reacts with Cl 2 (g) to form FeCl 3 (s) , 400 kJ of energy are evol

Question

1)When Fe(s) reacts with Cl2(g) to form FeCl3(s) , 400 kJ of energy are evolved for each mole of Fe(s) that reacts.

Write a balanced thermochemical equation for the reaction with an energy term in kJ as part of the equation. Note that the answer box for the energy term is case sensitive.

Use the SMALLEST INTEGER coefficients possible and put the energy term (including the units).

2)When NH3(g) reacts with O2(g) to form NO(g) and H2O(g) , 226 kJ of energy are evolved for each mole of NH3(g) that reacts.

Write a balanced thermochemical equation for the reaction with an energy term in kJ as part of the equation. Note that the answer box for the energy term is case sensitive.

Use the SMALLEST INTEGER coefficients possible and put the energy term (including the units).

Explanation / Answer

1)

2Fe(s) + 3Cl2(g) --> 2FeCl3(s) : H = -400 kJ/mol of Fe(s)

H = -400 * 2 = -800 kJ

2)

4NH3(g) + 5O2(g) --> 4NO(g) + 6H2O(g) : H = -226 kJ/mol of NH3(g)

H = -226 * 4 = -904 kJ

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