Question Detail

CHM 101 CHM 101 Past Questions Objective Question
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Question

Which of the following statements best defines Hess's Law?
Options
A The enthalpy of a reaction is independent of the pressure applied.
B The total enthalpy change for a reaction is the same, regardless of the number of steps.
Correct Answer
C The enthalpy change depends only on the products formed.
D The enthalpy of a system always increases with temperature.
Correct Answer

Option B is the correct answer.

Detailed Explanation

Hess's Law states that the enthalpy change for a chemical reaction is independent of the pathway taken. It depends only on the initial and final states, meaning the total ΔH is the same whether the reaction occurs in one step or a series of steps.

Hint

This law is about enthalpy being a state function, so the path doesn't matter, only the start and end.

Question Info

Course: CHM 101
Topic: CHM 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 282 of 1872
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