Diffusion refers to the force of attraction between the particles of the same substance the force of attraction between the particles of two different substances the random movement of one substance through another separation of one substance from another based on differences in density

The correct option is ' random movement of one substance through another'.

Explanation:

Diffusion is defined as movement of the particles from area having higher concentration to the area having lower concentration. It is usually observed  in gases and liquids.

For example: Drop of ink in water

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 :