There are atoms in aluminium (III) oxide (Al 2 O 3 ), with two Al atoms in the middle.Hematite ( Fe 2 O 3 ), commonly known as iron (III) oxide, has 5 atoms, with Fe atoms in the middle.Role="math" localid="1663347603404" Fe 2 O 3 ( s ), A l 2 O 3 ( s ) and F e 3 O 4 ( s )are all oxides of iron (s). We may compare molecular complexity as the defining factor for entropy difference since all compounds have the same physical state - solid (at the given temperature and pressure). Therefore, the order is: NO 2 ( g ) > NO ( g ) > N 2 ( g ).Īll of the mentioned compounds are metal oxides, including Fe 2 O 3 ( s ), A l 2 O 3 ( s ) and F e 3 O 4 ( s ). So, grouping chemicals in decreasing order of standard molar entropy as: The other two gases have the same number of atoms, but NO has more vibrational modes due to potential resonance structures, hence it has higher entropy as well. Two N atoms are linked in nitrogen gas ( N 2 ).Īs a result, because NO 2 contains the most atoms, it has the most vibration modes and the highest molar entropy.Nitrogen monoxide (NO) has two resonance structures since it contains two atoms (N and O).There are three atoms in nitrogen dioxide ( NO 2 ( g )), with N in the middle.The number of atoms in each compound is counted as follows: As a result, examining the molecular structure and comparing the chemical structures of each component is necessary. The more atoms or the longer the chain, the more vibration modes are conceivable. We may compare molecular complexity as the defining factor for entropy difference since all compounds have the same physical state - gaseous (at the given temperature and pressure).ĭue to the mobility of distinct sections of a molecule, bigger compounds have a higher entropy. The molecules supplied - NO 2 ( g ), NO ( g ) and N 2 ( g )- are all nitrogen-containing compounds. Therefore, the order is: Cl O 4 - > Cl O 3 - > Cl O 2. Looking at the molecular structure and comparing the chemical structures of each compound, the perchlorate ion would have the most atoms linked to the central Cl, resulting in the presence of more vibration modes and consequently the maximum entropy.Ĭomparing the entropy of chlorate ion ( Cl O 3 - )with chlorine dioxide ( Cl O 2 - ), chlorate has more oxygens connected to the primary chlorine atoms, hence it has a greater entropy.Īs a result, placing substances in decreasing order of standard molar entropy as: The longer the chain or the more atoms are present, the more vibration modes are possible. We can compare molecular complexity as the defining factor for entropy difference because all compounds are in the same physical state (at room temperature and pressure).ĭue to the mobility of distinct sections of a molecule, bigger compounds have a higher entropy. As a result, their physical condition can't be used to differentiate between entropy discrepancies. In the aqueous solution, they are all present as ions. All of the provided molecules - Cl O 4 - ( aq ), Cl O 3 - ( aq ) and Cl O 2 - ( aq ) are chloro-oxo compounds in different forms.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |