Given the chemical equation, predict the ΔS system for this change.
1 answer:
Answer : The system for this change is, negative
.
Explanation :
Entropy : It measure the randomness and the disorderedness of the system.
As we know that the entropy increases, as we are moving from the solid state to liquid state and liquid state to gaseous state and the entropy decreases,
as we are moving from gaseous state to liquid state and liquid state to solid state.
The given reaction is,
In this reaction, the phase changes from gaseous state to liquid or aqueous state. That means the entropy of the system for this change will be negative.
Hence, the system for this change is, negative
.
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Answer:
See the images below
Step-by-step explanation:
To draw a dot diagram of an atom, you locate the element in the Periodic Table and figure out how many valence electrons it has. Then you distribute the electrons as dots around the atom,
a. Silicon.
Si is in Group 14, so it has four valence electrons.
b. Xenon
Xenon is in Group 18, so it has eight valence electrons. We group them as four pairs around the xenon atom.
c. Calcium
Calcium is in Group 2, so it has two valence electrons. They are in a single subshell, so we write them as a pair on the calcium atom.
d. Water
Oxygen is in Group 16, so it has six valence electrons. The hydrogen atoms each contribute one electron, so there are eight valence electrons.
Chemists often use a dash to represent a pair of electrons in a bond.
