Example 13 1 The density of water is 1000 kg m The density

Last updated: 6/9/2023

Example 13 1 The density of water is 1000 kg m The density of water vapour at 100 C and 1 atm pressure is 0 6 kg m The volume of a molecule multiplied by the total number gives what is called molecular volume Estimate the ratio or fraction of the molecular volume to the total volume Occupied by the water vapour under the above conditions of temperature and pressure wer For a given mass of water molecules density is less if volume is large So the me of the vapour is 1000 0 6 6 104 s larger If densities of bulk water and water ecules are same then the fraction of cular volume to the total volume in liquid is 1 As volume in vapour state has ased the fractional volume is less by the amount i e 6x10 ample 13 2 Estimate the volume of a er molecule using the data in Example 1 er In the liquid or solid phase the the mas a molecule of water is 0 018 6 x 10 ka 3 x 10 20 kg Therefore a rough estimate of follows volume of a water molecule is as Volume of a water molecule 3 x 10 26 kg 1000 kg m 3 x 10 29 m 4 3 Radius Hence Radius 2x10 10 m 2 A Example 13 3 distance between atoms distance in water Use the data given in Examples 13 1 and 13 2 What is the averag interatom 0