Answer:
The boiling point of a liquid is the temperature at which its vapor pressure is equal to the pressure of the gas above it.The normal boiling point of a liquid is the temperature at which its vapor pressure is equal to one atmosphere (760 torr). Microscopic view inside a bubble in boiling water.
Explanation:
The Lewis bases are those which can donate electron pair to an acceptor. These electrons can be a pair of electron that is a lone pair, a negative charge or electrons in a
-bond.
- In
, the presence of
-bond make it a Lewis base. - In
, the presence of negative charge makes it a Lewis base. - In
, the presence of lone pair on nitrogen makes it a Lewis base. - In
, there is no lone pair, no
-bond, no negative charge so it is not a Lewis base.
Hence,
,
, and
are Lewis bases.
Answer:
B. the role of creativity in scientific discovery
Explanation:
Watson and Crick's ball-and-stick model of DNA demonstrates the importance of creativity in science. Creativity involves having a questioning mind that is always searching for answers and which employs logical reasoning to arrive at these answers. After Rosalind Franklin obtained an X-ray diffraction of DNA, Scientists Watson and Crick expanded on this knowledge by creatively organizing ball and sticks in a manner that represenseted the structure of the DNA.
This simple creative act led to more discoveries about the DNA including the facts that their was a pairing wherein Adenine paired with Thymine and Cytosine paired with Guanine. They also found that the DNA structure could be unzipped and that copying was also possible. They used the simple things around them to arrive at this conclusion. This is an example of the importance of creativity in science.
Explanation:
The given data is as follows.
T = 298 K,
= -5645 kJ/mol
= -5798 kJ/mol
Relation between
and
are as follows.
=
-5798 kJ/mol = -5645 kJ/mol - 
-153 kJ/mol = -
= 0.513 kJ/mol K
Now, temperature is
= (37 + 273) K = 310 K
Since,
=
= 
= (-5645 kJ/mol - 159.03 kJ/mol)
= -5804.03 kJ/mol
As, change in Gibb's free energy = maximum non-expansion work

= -5804.03 kJ/mol - (-5798 kJ/mol)
= -6.03 kJ/mol
Therefore, we can conclude that the additional non-expansion work is -6.03 kJ/mol.