Chemistry-Hess's Law
NEET Chemistry Hess's Law MCQ Question
Type: MCQ-conceptual-Easy-Class 11
Which of the following statements about Hess's Law is correct?
A
The change in enthalpy is dependent on the reaction pathway.
B
Reversing a chemical equation reverses the sign of the enthalpy change.
C
Hess's Law applies only to exothermic reactions.
D
The enthalpy change for a reaction occurs in only one step.
Correct Answer
Option B
Detailed Explanation
Hess's Law states that the change in enthalpy for a reaction is the same regardless of the pathway taken, and when a chemical equation is reversed, the value of ∆rH° is indeed reversed in sign.
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