given the reaction: 2mg + o2-----> 2mgo . when 4.32g of oxygen react with magnesium 327kj of energy is produced. the heat of reaction for 1 mole of oxygen is???
how many moles is 4.32 of MgO?
take that number, call it NUMBER.
heat of energy = 327kjoules/NUMBER
To find the heat (enthalpy) of reaction for 1 mole of oxygen in the given reaction, we need to use stoichiometry and the given information.
First, let's calculate the moles of oxygen (O2) using its molar mass. The molar mass of oxygen (O2) is approximately 32 g/mol.
Given: Mass of oxygen (O2) = 4.32 g
Molar mass of oxygen (O2) = 32 g/mol
Number of moles of oxygen (O2) = Mass / Molar mass
= 4.32 g / 32 g/mol
= 0.135 mol
Now, we can use the stoichiometry of the reaction to determine the heat of reaction for 1 mole of oxygen. From the balanced chemical equation,
2 mg + O2 -----> 2 MgO
We can see that the stoichiometric coefficient of oxygen (O2) is 1, meaning that 1 mole of O2 reacts to produce 327 kJ of energy.
So, the heat of reaction for 1 mole of oxygen is 327 kJ.
Therefore, the heat of reaction for 1 mole of oxygen in the given reaction is 327 kJ.