Q1: Rank compounds in order of decreasing vapor pressure, assuming neat (e.g., p
ID: 980710 • Letter: Q
Question
Q1: Rank compounds in order of decreasing vapor pressure, assuming neat (e.g., pure).
- water
- methanol
- acetone (CH3)2CO
Q2: Which molecule would be expected to expect the highest boiling point as a pure substance that are molecular isomers with the same molecular formula, C5H12? 10 vs 40 0C.
- neopentane ( Hint: (CH3)4 C )
- normal pentane or n-pentane ( Hint: CH3 (CH2)3 CH3 )
Q3: Indicate the following families, or trending groups or clusters on a periodic table.
- metals
- nonmetals
- metalloids
- noble gas
- chalcogens
- alkali metal cations
- pnictogen
- transition metal cations
- alkaline earth metals
- halogen
Explanation / Answer
Q1: Rank compounds in order of decreasing vapor pressure, assuming neat (e.g., pure).
as P vap decreases ---> Tboil increases; therefore
- water = lowest
- methanol = highest
- acetone (CH3)2CO = medium
Q2: Which molecule would be expected to expect the highest boiling point as a pure substance that are molecular isomers with the same molecular formula, C5H12? 10 vs 40 0C.
The more linear, the higher BP
- neopentane ( Hint: (CH3)4 C )
- normal pentane or n-pentane ( Hint: CH3 (CH2)3 CH3 ) they have the same (since they are the same)
Q3: Indicate the following families, or trending groups or clusters on a periodic table.
- metals - all those on the left, right
- nonmetals -- all those on the group 7,8 and N,C, O, P, Si,
- metalloids -- elemnts such as B, Si, Ge, As, Sb, Te
- noble gas - family 8 (right column)
- chalcogens - all those on gorup 6A (oxygen family)
- alkali metal cations - Those on Group IA, such as Na,Li, K, etc...
- pnictogen -- all those in the Nitrogen Family (Group 5A) such as N, P , As, Sb, etc..
- transition metal cations -- All those between group 2A and 3A (metals starting from Sc to Cn
- alkaline earth metals - those on Group 2A (calcium, Ba, Mg, etc..)
- halogen
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.