Enthalpy
What is Enthalpy?
The amount of thermal energy in a substance undergoing a physical or chemical change is called enthalpy. Although we are not able to measure the enthalpy of a given substance, we can measure the change in enthalpy as there is an energy change in a reaction.
adapted from:
DiGiuseppe, M., Haberer, S., Salciccioli, K., Sanader, M., & Vavitsas, A. (2012). Nelson Chemistry 12 University preparation. Toronto, ON: Nelson Education Ltd.
The amount of thermal energy in a substance undergoing a physical or chemical change is called enthalpy. Although we are not able to measure the enthalpy of a given substance, we can measure the change in enthalpy as there is an energy change in a reaction.
adapted from:
DiGiuseppe, M., Haberer, S., Salciccioli, K., Sanader, M., & Vavitsas, A. (2012). Nelson Chemistry 12 University preparation. Toronto, ON: Nelson Education Ltd.
LESSON OVERVIEW (SPECIFIC EXPECTATIONS: D2.1, D2.2, D3.1, D3.6)
Lesson Hook/Minds On:
Show students YouTube clip about a neat endothermic reaction. It gives quite a good explanation as it goes along as to what is happening. In the end you could engage students in a brief discussion by asking students: Is this reaction exo- or endothermic? So has heat left the system or has it been absorbed by the system? |
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Teaching Strategy:
Using the Prezi linked below, introduce the concepts of enthalpy and enthalpy change to students. The visuals in combination with the teacher`s oral presentation will target both visual and auditory learners. The Prezi explains content of this lesson with the use of many examples. It also walks-through problem solving some enthalpy calculations. At the end of the Prezi there is a quiz that can be returned to in the consolidation.
Now would be a good time to model to your students how to solve molar enthalpy calculations (blackboard, white board, SMART board, etc.). It would also be beneficial to students to start getting accustomed to potential energy diagrams to helps visualize what is happening in these chemical and physical changes. Problem solving as a class in a step-by-step fashion will reach our logical-mathematical students while the potential energy diagrams will be great for visual-spatial learners.
Using the Prezi linked below, introduce the concepts of enthalpy and enthalpy change to students. The visuals in combination with the teacher`s oral presentation will target both visual and auditory learners. The Prezi explains content of this lesson with the use of many examples. It also walks-through problem solving some enthalpy calculations. At the end of the Prezi there is a quiz that can be returned to in the consolidation.
Now would be a good time to model to your students how to solve molar enthalpy calculations (blackboard, white board, SMART board, etc.). It would also be beneficial to students to start getting accustomed to potential energy diagrams to helps visualize what is happening in these chemical and physical changes. Problem solving as a class in a step-by-step fashion will reach our logical-mathematical students while the potential energy diagrams will be great for visual-spatial learners.
Consolidation:
To sum up, you can return to the Prezi for the quiz included at the end. Students can be put into groups to collaborate or work individually. The quiz questions will help recollect the knowledge students have gathered and help them return to it in the future. If students have personal electronic devices or access to computers, the quiz can be made completely virtual using Socrative.com. This might be a fun touch to help engage students.
To sum up, you can return to the Prezi for the quiz included at the end. Students can be put into groups to collaborate or work individually. The quiz questions will help recollect the knowledge students have gathered and help them return to it in the future. If students have personal electronic devices or access to computers, the quiz can be made completely virtual using Socrative.com. This might be a fun touch to help engage students.
FOPP: Professional knowledge
Click below for a few resources that can be used in conjunction with a lesson to further demonstrate the concept of enthalpy.