The main organic product for the reaction is shown in the following figure.
Explanation:
This is due to the presence of the substituent -CH3 in the molecule, which makes it impossible to leave the hydrogen to form the double bond in the elimination.
Here amount of nitrogen gas in both states remain constant.
So, in accordance with combined gas law for a given amount of an ideal gas in two different states:
where and are initial and final pressure respectively. and are initial and final volume respectively. and are initial and final temperature (in kelvin scale) respectively.