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

11.50 Heating and Cooling Curves Worksheet

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Worksheet Overview & Skills Covered

Core academic competencies and curriculum alignment

This Chemistry Science worksheet provides structured practice on 11.50 Heating and Cooling Curves. Students are guided through targeted exercises that build foundational understanding, computational accuracy, and critical thinking skills.

Heating and Cooling Curves: Interpret heating and cooling curves, plateaus, phase changes, heat of fusion, heat of vaporization, and temperature-energy relationships. Aligned to NGSS, CCSS, 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 - Heating and Cooling Curves 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 11.50 Heating and Cooling Curves skill assessments:

Problem 1Difficulty: Mastery

A 16.0 g sample at its melting point absorbs 2.40 kJ to finish melting, then absorbs 0.960 kJ as the liquid warms by 30.0 degrees C. What are DeltaHfus and the liquid specific heat?

A150 J/g and 2.00 J/g degrees C.

B2.40 J/g and 0.960 J/g degrees C.

C150 J/g and 0.500 J/g degrees C.

D2400 J/g and 2.00 J/g degrees C.

Solution & Explanation:DeltaHfus = 2400 J / 16.0 g = 150 J/g. The liquid specific heat is 960 J / [(16.0 g)(30.0 degrees C)] = 2.00 J/g degrees C.

Problem 2Difficulty: Mastery

A graph shows a liquid boiling at a constant temperature while the sample mass decreases steadily. Which conclusion is best supported?

AThe liquid is not absorbing energy because its temperature is constant.

BThe molecules are being destroyed, so mass disappears without vapor formation.

CThe boiling point must be decreasing every minute because mass decreases.

DVapor is escaping while the remaining liquid-vapor mixture stays at the boiling temperature.

Solution & Explanation:During boiling in an open container, molecules leave as vapor, decreasing mass, while the remaining liquid-vapor mixture stays at the boiling temperature.

Problem 3Difficulty: Mastery

Water is heated under reduced pressure in a vacuum chamber. Which curve feature is most likely compared with heating water in an open beaker at 1 atm?

AThe melting plateau must occur above 100 degrees C.

BThe boiling plateau disappears because liquids cannot vaporize in vacuum.

CThe boiling plateau occurs below 100 degrees C.

DThe water must remain liquid at all temperatures.

Solution & Explanation:Reduced pressure lowers the temperature at which water's vapor pressure equals external pressure, so boiling occurs below 100 degrees C.

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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.).