Free Printable WorksheetScienceGrade 11Science CurriculumNGSS HS-PS1-4; AP Chem Units 6 and 9; CCSS HSN-Q.A.1-3 and HSA-CED.A.1-4

11.76 Exothermic and Endothermic Processes Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Chemistry Science worksheet provides structured practice on 11.76 Exothermic and Endothermic Processes. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Exothermic and Endothermic Processes: Identify exothermic and endothermic changes using signs of enthalpy, heat flow, temperature changes, and energy diagrams. Aligned to NGSS, CCSS, AP Chemistry/Pre-AP Chemistry, and representative state chemistry framework crosswalks NGSS HS-PS1-4; AP Chem Units 6 and 9; CCSS HSN-Q.A.1-3 and HSA-CED.A.1-4 - Exothermic and Endothermic Processes Chemistry Standards Crosswalk: National: NGSS HS-PS1-4; AP Chem Units 6 and 9; CCSS HSN-Q.A.1-3 and HSA-CED.A.1-4. State frameworks: TX TEKS 112.43(c)(13); FL SC.912.P.10.4, P.10.6; MA/CA/NY/NJ HS-PS1 energy standards; GA and VA thermochemistry/energy standards.

Whether you are an educator preparing classroom handouts, a tutor reinforcing weekly topics, or a parent supporting homeschool learning, this printable resource gives students the deliberate practice required to achieve subject fluency and master state standards.

Grade

Chemistry

Subject

Science

Domain

Science Curriculum

Formats

PDF & DOCX

Sample Practice Problems

Preview the types of problems and questions covered in this worksheet

Below are sample questions representative of the exercises included on this worksheet and related 11.76 Exothermic and Endothermic Processes skill assessments:

Problem 1Difficulty: Mastery

Use the combined visual in the image. Which conclusion is best?

AThe process is exothermic: ΔH is positive and heat flows out of the system.

BThe process is endothermic: ΔH is negative and heat flows out of the system.

CThe process is exothermic: ΔH is negative and heat flows into the system.

DThe process is endothermic: ΔH is positive and heat flows into the system.

Solution & Explanation:The visual shows products higher than reactants, which gives positive ΔH. The inward heat arrows show heat entering the system, confirming endothermic behavior.

Problem 2Difficulty: Mastery

A reaction releases heat overall but still stops when the initial flame is removed too soon. Which explanation is most consistent?

AThe reaction is endothermic because removing the flame stops it.

BThe reaction is thermoneutral because a flame was involved.

CThe reaction is exothermic overall, but it still needs enough activation energy to keep reacting.

DThe reaction has positive ΔH because activation energy is positive.

Solution & Explanation:An exothermic reaction can still require activation energy. If the initial energy input is insufficient, the reaction may not continue even though products are lower in enthalpy.

Problem 3Difficulty: Mastery

Which statement best distinguishes heat from temperature when classifying reactions?

AExothermic means products have a higher temperature than reactants.

BExothermic means heat leaves the system; temperature changes are evidence from the surroundings, not the definition itself.

CEndothermic means the thermometer must always read below 0°C.

DTemperature and heat are identical, so either word can define ΔH.

Solution & Explanation:Heat is energy transferred because of temperature difference; temperature is a measure related to particle kinetic energy. Exothermic classification is based on heat leaving the system.

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QWhat grade level and standards does this worksheet align with?

This worksheet is designed specifically for Chemistry Science students. It aligns with educational standard NGSS HS-PS1-4; AP Chem Units 6 and 9; CCSS HSN-Q.A.1-3 and HSA-CED.A.1-4 (National: NGSS HS-PS1-4; AP Chem Units 6 and 9; CCSS HSN-Q.A.1-3 and HSA-CED.A.1-4. State frameworks: TX TEKS 112.43(c)(13); FL SC.912.P.10.4, P.10.6; MA/CA/NY/NJ HS-PS1 energy standards; GA and VA thermochemistry/energy standards.).