3. A Pulaski High School senior was applying to college and wondered how many applications he needed to send. His counselor
explained that with the excellent grade he received in chemistry he would probably be accepted to one school out of every three
to which he applied. [3 applications = 1 acceptance] He immediately realized that for each application he would have to write 3
essays, (1 application = 3 essays) and each essay would require 2 hours work (1 essay = 2 hours). Of course writing
essays is no simple matter. For each hour of serious essay writing, he would need to expend 500 calories (1 hour = 500
calories) which he could derive from his mother's apple pies (1 pie = 1000 calories). How many times would he have to
clean his room in order to gain acceptance to 10 colleges? Hopefully you didn't skip problem No 1. I'll help you get
started 10 acceptances is the "given".

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 :

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.