All of the statements regarding the symbol "ΔH" are correct except it
1 answer:
Answer: Option (D) is the correct answer.
Explanation:
Enthalpy is defined as the amount of energy needed or removed from a substance. It is represented by .
Basically, it is the change in enthalpy and it represents the difference between the energy used in breaking bonds and the energy released in formation of bonds in a chemical reaction.
It is also known as heat of reaction. When value of is positive then it means heat is absorbed in the chemical reaction.
When value of is negative then it means that heat is released in the chemical reaction.
Whereas entropy means the measure of randomness. It is represented by . We cannot calculate entropy but we can measure the change in entropy.
Thus, we can conclude that all of the statements regarding the symbol "ΔH" are correct except it that can be called entropy change.
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Answer:
The average bond enthalpy for the N-H bond is 392 kJ/mol.
Explanation:
..[1]
..[2]
..[3]
On adding [1] , [2] and [3] , we get:
There three bonds N-H bond sin ammonia. Then average bond enthalpy of single N-H bond is :
The average bond enthalpy for the N-H bond is 392 kJ/mol.