Ihave 2 questions:
sulfur has an atomic number of 16 and belongs in group 6 on the periodic table. calcium has an atomic number of 20 and belongs in group 2 on the periodic table. which element has a greater reactivity and why?
how do you know if an element in reactive or not?

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 :