In a balanced equation, the number of each type of atom on the reactant side the number of each type of atom on the product side.

Equal

In balanced equation, the number of each type of atom on reactant side are equal to the number of each type of atom on product side.

Explanation:

Example:

Consider the example of neutralization reaction.

Hydrochloric acid when react with the sodium hydroxide, a salt sodium chloride and water are formed.

Chemical equation:

HCl + NaOH → NaCl + H₂O

When an acid react with base it form the salt and  water. The reaction is also called neutralization reaction because both neutralize each other.

In neutralization reaction equal amount of acid and base react to neutralize each other and equal amount of water and salt are formed. We can see that two hydrogen atoms, one chlorine atom, one oxygen atom and one sodium atom are present on left and also on right side.

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 :