Assume that air consists of n2 molecules with a collision diameter of 395 pm. calculate (i) the relative mean speed of the molecules, (ii) the mean free path, and (iii) the collision frequency in air at 1.00 atm and 25 0c. repeat the calculations at p = 0.0500 atm and 25 0c. repeat the calculations at p = 1.00 atm and 45 0c.

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol