Calculate the heat formation:
4NH3(g)+502(g)+6H2O(l)
↑ ↑ ↑
Small numbers that go on the bottom. (Sorry, I do not have such a good phone)
I don't see any products. Heat formation of what?
Just type normally, we know what should be a subscript.
To calculate the heat formation of the given reaction:
1. First, write down the balanced chemical equation for the reaction:
4NH3(g) + 5O2(g) + 6H2O(l) → 4NO2(g) + 6H2O(l)
2. Identify the coefficients (numbers in front of the reactants and products) in the balanced equation:
Coefficient of NH3(g) = 4
Coefficient of O2(g) = 5
Coefficient of H2O(l) = 6
3. Locate the standard heat of formation (ΔH°f) values for each of the substances involved in the reaction. These values are usually tabulated and available in reference books or online databases.
4. Use the ΔH°f values to calculate the heat formation. The heat formation (ΔH°) can be calculated using the following formula:
ΔH° = Σ (ΔH°f products) - Σ (ΔH°f reactants)
The Σ symbol represents the sum of the values.
5. Substitute the respective ΔH°f values for each substance into the equation and calculate the heat formation:
ΔH° = (4 * ΔH°f(NO2)) + (6 * ΔH°f(H2O)) - (4 * ΔH°f(NH3)) - (5 * ΔH°f(O2))
Note: Make sure to use the correct signs (+ or -) for the ΔH°f values.
Remember that ΔH°f values have units of energy per mole (such as kilojoules per mole, kJ/mol). Also, ensure that the units are consistent throughout the calculation.
By following these steps and using the ΔH°f values for each substance, you can calculate the heat formation of the given reaction.