High School / Chemistry

Hess's Law

Students use a temperature sensor to experimentally determine the heat of reaction for the formation of a compound.

Supports NGSS Performance Expectation HS-PS1-4: Develop a model to illustrate that the release or absorption of energy from a chemical reaction system depends upon the changes in total bond energy.


Student Files

11C_Hess_Law.docx 438.07 KB
11C_answer_sheet.docx 128.50 KB
11C_Hess_Law.pdf 371.79 KB
11C_answer_sheet.pdf 326.02 KB
11C_Hess_Law_Google_Slide.pdf 30.79 KB

Teacher Files

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Featured Equipment

Temperature Sensor

Wireless Temperature Sensor

The Wireless Temperature Sensor is a general-purpose sensor found in many science labs. With a rugged, waterproof design, and long-lasting battery, students can spend more time collecting data and less time dealing with equipment.

Many lab activities can be conducted with our Wireless, PASPORT, or even ScienceWorkshop sensors and equipment. For assistance with substituting compatible instruments, contact PASCO Technical Support. We're here to help.

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Source: Lab #11C

Essential Chemistry Teacher Lab Manual

Hess's Law