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

11.75 Systems, Surroundings, Heat, and Work Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Chemistry Science worksheet provides structured practice on 11.75 Systems, Surroundings, Heat, and Work. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Systems, Surroundings, Heat, and Work: Distinguish system and surroundings and explain heat, temperature, work, internal energy, and energy transfer in chemical processes. 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 - Systems, Surroundings, Heat, and Work 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 11.75 Systems, Surroundings, Heat, and Work skill assessments:

Problem 1Difficulty: Mastery

A student observes a metal can getting warmer during a reaction inside it. The system is defined as the chemicals only. Which statement best separates system and surroundings?

AThe can must be part of the system because its temperature changes.

BThe chemicals gain heat from the can because the can warms.

CThe can is neither system nor surroundings because it is only a container.

DThe can is part of the surroundings and gains energy as heat from the chemical system.

Solution & Explanation:Objects outside the chosen system boundary are surroundings even if they touch the system. A warmer can indicates energy transferred from the chemicals to the can.

Problem 2Difficulty: Mastery

A data-rich question gives q_system = +35 kJ and Delta U_system = +10 kJ for an expanding gas. Which statement must be true?

Aw_system = +25 kJ, so the surroundings compressed the gas.

Bw_system = -45 kJ, so the gas absorbed work.

Cw_system = -25 kJ, so the gas did work on the surroundings.

Dw_system = 0 kJ, because expansion only changes volume.

Solution & Explanation:Delta U = q + w. With +10 kJ = +35 kJ + w, w = -25 kJ. Negative work for a gas usually means expansion work done on the surroundings.

Problem 3Difficulty: Mastery

A system is returned to its original temperature, volume, and composition after a sequence of heating, expansion, cooling, and compression steps. What does this guarantee?

AEvery step had q = 0 and w = 0.

BThe net change in internal energy is zero, but heat and work over the sequence may not be zero individually.

CThe surroundings must have no net change under all conditions.

DThe system did not exchange energy because its final state matched its initial state.

Solution & Explanation:Internal energy is a state function, so returning to the same state gives Delta U = 0. Heat and work can still occur during the cycle.

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Frequently Asked Questions

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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.).