<span>A.the elements that make up the compound
Tis the answer.</span>
A hydrogen atom forms one bond, an oxygen atom forms two, and carbon forms four bonds.
Explanation:
Entropy is defined as the degree of randomness present in a substance. Therefore, more is the irregularity present in a compound more will be its molar entropy.
Hence, decreasing order to molar entropy in state of matter is as follows.
Gases > Liquids > Solids
- In the first pair, we are given
or
. Since, molar entropy of liquids is less than the molar entropy of gases.
Hence,
will have larger molar entropy as compared to
.
- In the second pair, we are given Fe(s) or Ni(s). More is the molar mass of a compound more will its molar entropy. Molar mass of Fe is 55.84 g/mol and molar mass of Ni is 58.69 g/mol.
Hence, molar entropy of Ni(s) is more than the molar entropy of Fe(s).
- In the third pair, we are given
or
. As both the given species are gaseous in nature. So, more is the molar mass of specie more will be its molar entropy.
Molar mass of
is 30.07 g/mol and molar mass of
is 28.05 g/mol. Therefore, molar entropy of
is more than the molar entropy of
.
- In the fourth pair, we are given
or
. Molar mass of
is 153.82 g/mol and molar mass of
is 16.04 g/mol.
Therefore, molar entropy of
is more than the molar entropy of
.
- In the fifth pair, we are given HgO(s) or MgO(s). Molar mass of HgO is 216.59 g/mol and molar mass of MgO is 40.30 g/mol.
Hence, molar entropy of HgO(s) is more than the molar entropy of MgO.
- In the fifth pair, we are given NaCl(aq) or
. Molar mass of NaCl 58.44 g/mol and molar mass of
is 95.21 g/mol.
Hence, the molar entropy of
is more than the molar entropy of NaCl(aq).
Answer:
Sulfur has the same amount, like all the other elements in group 16, has six valence electrons.
Explanation:
Given:
AgCl (s) ===> Ag+ (aq) + Cl- (aq)
- negative entropy
H2O(g) ===> H2O(l)
- positive entropy
2Na (s) + Cl2 (g) ===> 2NaCl (s)
- positive entropy
Br2(l) ===> Br2 (s)
-positive entropy
They are identified to have positive or negative values of entropy based on the phases of the reactants and products.