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Heat and Heat Transfer
Investigation 2
Investigation 2
Heat and Heat Transfer
Phase 1 – Defined Understanding
Student Guide
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Access Teacher Guide
Student Guide with answers
Teacher PreLab
Prepare for the Experiment
Phase 2 – Dynamic Understanding
► Investigation Two Summary – Thermal Energy and Solutes
In Investigation Two, you investigated how changes in thermal energy affect some of the physical properties of matter. You also investigated how addition of a solute can change the freezing and boiling point of water. During this Investigation, you:
1. Observed the affects of a solute on freezing point using varying salt solutions and an ice bath.
2. Observed the affects of a solute on boiling point using the varying salt solutions.
► Investigation Two Summary – Learning Goals
Through these experiments, you concluded that:
1. The boiling point of water represents the transfer of enough thermal energy to increase the kinetic energy of molecules and break the bonds of molecules so that water changes from a liquid to a gas. The freezing point of water represents the transfer of thermal energy such that the kinetic energy of molecules and the formation of bonds between molecules result in the change of liquid water to solid ice.
2. Adding a solute to water decreases the freezing point of water and increases its boiling point.
Concept Slides
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Mathematics Concepts in This Investigation
- qualitative/quantitative properties
- comparing (non)measurable characteristics
- predict/verify results
- temperature in Celsius
- mass in grams
- volume in mL
- time in seconds/minutes
- data table
- data analysis
- length in cm
- measuring mass using triple beam balance
- negative/positive integers
- greater than/less than/equal to
- variables/constants
- line graph
- patterns/trends
- (in)direct relationships
- skip counting by 10