Two flasks have the same gas at the same initial temperature T and pressure P. The volume V of the flask #1 is much bigger than the volume V2 of the second flask (Vi > V) The flasks are connected by a narrow glass tube which has a drop of liquid mercury. Because the pressure in each flask is the same the drop of mercury is at equilibrium exactly in the middle of the glass tube. Would the drop of mercury move to either side if both flasks were heated up to the same higher temperature Thigh? The volume of the glass tube is negligibly small in comparison to the volume of flasks. Therefore, the change of the position for the mercury drop simply serves as an indicator of the pressure change between flask #1 and 2. For example, if the mercury drop moves from the center to the flask #2 it means that pressure in flask #1 > pressure in flask #2. Circle the correct answer below and support it with your calculations. Glass tube with a mercury drop #2 #1 Answer: The drop of mercury will: a) move to flask #1 ; b) move to flask #2; c) stay at the center;

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Aromatic Compounds

Aromatic organic compound or aromatic system is an important class of hydrocarbons under the branch of organic chemistry. Aromatic compounds are also called arenas. The definition of aromatic organic compounds can be stated as a class of organic compounds with a planar cyclic ring of atoms bonded through alternated single and double bonds. Due to these alternating bonds, a peculiar feature termed as ‘resonance’, that is, delocalization of pi electrons or the electrons is shared within the atoms of the ring which are present in the aromatic compounds. The word ‘aromatic’ includes a Greek word ‘aroma’ which means smell, indicating that they were named as such due to the sweet odor they produce. Many well-known flavors such as vanilla, cinnamon, and few scents from flowers are extracted from aromatic compounds. Benzene with chemical formula C6H6 is a very common aromatic compound that contains six atoms of carbon held in the cyclic ring of alternate double bonds. It is also to be noted that not all aromatic compounds contain benzene ring. This can be explained by Huckel’s rule.