You have 16.7 grams of hydrogen and 15.4 grams of oxygen in a synthesis rxn. Which is the limiting reagent?

Oxygen is the limiting reagent in the following synthesis reaction.

Explanation:

At first, we have to balance the chemical reaction,

i.e.,oxygen molecule requires 2 moles of hydrogen molecule in order to synthesise 2 moles of water molecule.

no. of moles of =

                              =0.48125 moles

no. of moles of =

                               = 8.2841 moles.

Now, for 1 mole of oxygen,2 mole of hydrogen is used, so;

no. of moles of = 8.2841/2 = 4.142 moles.

But, we don't have that many moles of and that's why, oxygen is considered as limiting reagent.

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :

ugh fiel iente of insistí is did kiwis jaj