Help your students build real understanding of heat of reaction calculation through ninety questions that move from basic recognition to genuine reasoning about chemistry concepts.
Among the ninety questions, students will see prompts such as "A 250 g sample of water is heated from 10°C to 50°C. How much heat is absorbed?", "How much heat is released when 600 g of a substance cools from 100°C to 50°C? (c = 2 J/g°C)?", and "If 100 g of water is heated from 20°C to 80°C, what is the heat absorbed? (c = 4.18 J/g°C)?"
Each worksheet reviews the same core ideas from a different angle. Use them across a week or unit so students see the material three times without it ever feeling repetitive.
This set is part of a complete NGSS aligned chemistry unit. The unit also covers Chemical Energy Basics, Exothermic and Endothermic, Energy Diagrams, Bond Breaking and Forming, Enthalpy Change, and Measuring Energy Transfer, all in the same three worksheet format, so your classroom routine stays familiar while the topic changes.
Suitable for Grade 9-12 chemistry classes, and for NGSS aligned review at any point in the school year. This set is aligned to NGSS standard HS-PS1-4.
