Practice Direct Experimental vs. Hess’s Law Determinations - 2.3 | Unit 5: Energetics and Thermochemistry | IB Grade 11: Chemistry
K12 Students

Academics

AI-Powered learning for Grades 8–12, aligned with major Indian and international curricula.

Professionals

Professional Courses

Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.

Games

Interactive Games

Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.

2.3 - Direct Experimental vs. Hess’s Law Determinations

Enroll to start learning

You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.

Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What does a coffee-cup calorimeter measure?

💡 Hint: Think about reactions that occur in solution.

Question 2

Easy

What is Hess’s Law?

💡 Hint: It's about the path independence of enthalpy.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What type of calorimeter would you use for a neutralization reaction in solution?

  • Bomb Calorimeter
  • Coffee-Cup Calorimeter
  • Sealed Calorimeter

💡 Hint: Think about the environment in which the reaction takes place.

Question 2

True or False: Hess’s Law applies only to reactions that occur in a single step.

  • True
  • False

💡 Hint: Consider if the number of reactions matters.

Solve 1 more question and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

If an unknown reaction produces 3000 J of heat in a bomb calorimeter, how can you find the ΔH for that reaction if 0.5 moles of gas were involved?

💡 Hint: Total changes in moles of gas will affect the enthalpy calculation.

Question 2

Calculate the enthalpy change for the following multi-step reaction using Hess’s Law. Consider the associated enthalpy changes from each step.

💡 Hint: Keep the stoichiometry aligned while summing up the enthalpy changes.

Challenge and get performance evaluation