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# System prepended metadata

title: 1st Creative (Environmental Chemistry)

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# 1st Creative (Environmental Chemistry)
This is the creative practiced by Purba Apu on 16 May 2020
![Imgur](https://i.imgur.com/Ggo4Y0P.png)

## Nitrogen Fixation
The chemical processes by which atmosphere nitrogen is assimilated by certain microorganisms as part of nitrogen cycle is called nitrogen fixation.

## AlCl~3 is a Lewis acid- explain
Definition of Lewis Acid...
We know, AlCl~3 is a Lewis acid. Because it can accept a pair of lone pair electron. According to the formation of this compound we can see that Al (the central atom) has vacant valance shell and it doesn't have octet formed. So it has a lacking of one pair of e⁻. So that it is why AlCl~3 accepts a pair of e⁻ and fill it's octet shell. It behaves like acid.
![Imgur](https://i.imgur.com/Ggo4Y0P.png)

## Graphs of gasses become curves instead of straight ones parallel to X-Axis
The given gasses in the stem are respectively CO~2 and N~2 (Real gasses). The graphs of these gases are curve instead of straight lines. It can be described by amagat curve.

Amagat curve definition...
Figure...

As in the stem, we can see that, for ideal gas at constant temperature, PV should remain constant in spite of variation of pressure and consequently the line will be straight line parallel to X-Axis denoting pressure. But in case of CO~2 or N~2 gas the value of PV decreases at first and then reaching the minimum point, it rises with the increase of pressure and crosses the value of RT. The lines are concave.

So, while the increasing of the pressure in X-Axis the intermolecular attraction increases respectively and the volume decreases. More pressure increases, then intermolecular repulsive force increases. So at one time the repulsive force becomes more than attraction force (PV>RT>1). Thus the lines of CO~2, N~2 are curve instead of straight line.


# Second Creative

## The Graph of B supports which law
According to the B graph, the pressure is constant, volume is gradually increasing as well as the temperature is increasing. So, graph B supports Charles Law. Charles law description...

## Form the combined equation describe A and B graph and describe the suitability of real gas according to the equation 
The Graph A graph describes the relation between volume and pressure. So A graph supports Boyel's Law. Boyel's law is the volume of a given mass of gas is inversely proportional to its pressure. So, V is proportional to 1/P[When temperature is constant].

On the other hand, B Graph supports the Charles law. Charles law , at constant pressure the volume is proportional to its temperature. So V is proportional to T.

So, combining the both law we get, V is proportional to T/P. Or, V= (KT)/P Or, PV=KT. So the last equation is a combined equation of Boyel's and Charles law. In this equation, there is a relation among gases pressure, volume and absolute Temperature. For all gasses ak is universal gas constant and denoted as R (molar has constant)

So the equation is, PV=nRT (for n mol gas). This equation is called ideal gas's equation. But it is not applicable for real gas. Because in PV = nRT has 2 error, as doesn't support this equation. PV=nRT is applicable for ideal gas, as ideal gas has a definite kind of volume. But for real gas, their real volume is neglected.