Q. According to Hess's law, if a reaction can be expressed as the sum of several steps, the enthalpy change for the overall reaction is:

हेस के नियम के अनुसार, यदि किसी प्रतिक्रिया को कई चरणों के योग के रूप में व्यक्त किया जा सकता है, तो समग्र प्रतिक्रिया के लिए एन्थैल्पी परिवर्तन है:

A
The average of the enthalpy changes of the individual steps
व्यक्तिगत चरणों के एन्थैल्पी परिवर्तन का औसत
B
The sum of the enthalpy changes of the individual steps
व्यक्तिगत चरणों के एन्थैल्पी परिवर्तनों का योग
C
The product of the enthalpy changes of the individual steps
व्यक्तिगत चरणों के एन्थैल्पी परिवर्तन का उत्पाद
D
Independent of the enthalpy changes of the individual steps
व्यक्तिगत चरणों के एन्थैल्पी परिवर्तनों से स्वतंत्र

Explanation

Hess’s Law says that the total enthalpy change of a reaction is equal to the sum of enthalpy changes of all individual steps, because enthalpy is a state function.

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