What is Hess law in thermochemistry?

A Enthalpy change is path-independent and depends only on initial and final states

B Entropy always increases

C Temperature is proportional to volume

D Pressure and volume are inversely related

✓ Correct Answer: Option A

Hess law: total enthalpy change of a reaction is the same regardless of the pathway, since enthalpy is a state function.

💡 Why is A) the correct answer?

The correct answer to the question "What is Hess law in thermochemistry?" is Option A: Enthalpy change is path-independent and depends only on initial and final states.

The other options — B) Entropy always increases, C) Temperature is proportional to volume, D) Pressure and volume are inversely related — are incorrect for this MCAT Exam Prep question. As explained above: Hess law: total enthalpy change of a reaction is the same regardless of the pathway, since enthalpy is a state function.

📚 About This MCAT Exam Prep Practice Question

This 2-level MCAT Exam Prep question from the Chemical & Physical Foundations topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free MCAT Exam Prep practice test or use flashcards for spaced repetition review.

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What is Hess law in thermochemistry?

✓ Correct Answer: Option A

📚 About This MCAT Exam Prep Practice Question

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