Scientis often need to define the system under study during an investigation. explain why defining the system under study is important

It is important because it separates the area that the process is happening from its surroundings, and it's easy to measure and make observations by doing that.

Explanation:

The system is the part of the universe that is separated for study. It has a frontier, which is the limitation of it, and the external area is the surroundings.

In the system the chemical and physical process is happening: reactions are taking place, gas is expanding, heat is being absorbed or lost, etc.

So, to understand the process that is happening, it's necessary to define the system under study because the measurements, analyze, and observation will be easily done.

your answers are a,b,,e and f

i hope this

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 :