Calculate the change in heat for the reaction
SO2 + 1/2O2 --> SO3
To calculate the change in heat for the reaction, we need to know the enthalpy change, known as ΔH, for the reaction.
Unfortunately, you haven't provided any information about the value of ΔH. It's typically given in kilojoules (kJ) per mole of the reaction.
Once you have the value of ΔH, you can use it to calculate the change in heat using the following equation:
ΔH = q / n
where ΔH is the enthalpy change, q is the heat absorbed or released during the reaction, and n is the number of moles of reactant or product involved in the reaction.
Without the value of ΔH or any other information about the reaction conditions, it's not possible to determine the change in heat for this reaction.
To calculate the change in heat for a reaction, you would need to use the concept of enthalpy. Enthalpy (ΔH) is a measure of the heat energy released or absorbed during a chemical reaction.
To calculate the change in heat for the reaction:
1. Determine the balanced chemical equation for the reaction.
The balanced chemical equation for this reaction is:
SO2 + 1/2O2 → SO3
2. Look up the standard enthalpy of formation (ΔHf) values for the reactants and products involved in the reaction.
The standard enthalpy of formation is the change in enthalpy that occurs when one mole of a substance is formed from its elements in their standard states at a specified temperature and pressure.
The standard enthalpy of formation values needed for this reaction are:
ΔHf(SO2) = -296.83 kJ/mol
ΔHf(O2) = 0 kJ/mol
ΔHf(SO3) = -395.72 kJ/mol
3. Calculate the change in heat (ΔH) using the following equation:
ΔH = ΣΔHf(products) - ΣΔHf(reactants)
Inserting the values, we get:
ΔH = [-395.72 kJ/mol] - [(-296.83 kJ/mol) + (0 kJ/mol)]
ΔH = -395.72 kJ/mol + 296.83 kJ/mol
ΔH ≈ -98.89 kJ/mol
Therefore, the change in heat (enthalpy) for the reaction SO2 + 1/2O2 → SO3 is approximately -98.89 kJ/mol.
Look up delta Ho for SO3 and SO2.
delta H rxn = delta H SO3 - delta H SO2