What is a bond between a positive and negative ion called?
2 answers:
Answer: Option (b) is the correct answer.
Explanation:
An ionic bond is defined as the bond formed due to transfer of electron(s) from one atom to another.
An ionic bond will always be formed between a metal and a non-metal.
For example, sodium metal on donating its one valence electron to chlorine atom will lead to the formation of NaCl compound.
This is because an atom which loses its valence electrons (metals) acquires a positive charge and another atom which gains the electrons (non-metals) acquires a negative charge.
Hence, these opposite charges strongly gets attracted towards each other forming a strong bond.
Whereas in a covalent bond, there will be sharing of electrons between the combining atoms.
For example, an molecule is formed due to sharing of electrons between the two oxygen atoms.
Thus, we can conclude that a bond between a positive and negative ion called an ionic bond.
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Answer: ΔH for the reaction is -277.4 kJ
Explanation:
The balanced chemical reaction is,
The expression for enthalpy change is,
where,
n = number of moles
Now put all the given values in this expression, we get
Therefore, the enthalpy change for this reaction is, -277.4 kJ
Answer : The entropy change for the surroundings of the reaction is, -198.3 J/K
Explanation :
We have to calculate the entropy change of reaction .
where,
= entropy of reaction = ?
n = number of moles
= standard entropy of
= standard entropy of
= standard entropy of
Now put all the given values in this expression, we get:
Therefore, the entropy change for the surroundings of the reaction is, -198.3 J/K