How does an increase in concentration affect the rate of a reaction?

a) it speeds the reaction up

b) it slows the reaction down

c) it decreases the number of collisions

Option (a) it speeds the reaction up

Explanation:

Increasing the concentration of a reactants speed up the reaction because it leads to effective collisions which in turn speeds up the reaction

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 :