Greenhouse Lab Results and Calorimetry

The teacher and students discuss the data gathered from the greenhouse gases experiment from segment C. An expert from Georgia Power explains how the company uses a device called a calorimeter to measure energy obtained from coal. The students set up their own calorimetry experiments using polystyrene cups to make a "coffee cup calorimeter.”

The teacher and students discuss the data gathered from the greenhouse gases experiment from segment C. An expert from Georgia Power explains how the company uses a device called a calorimeter to measure energy obtained from coal. The students set up their own calorimetry experiments using polystyrene cups to make a "coffee cup calorimeter.”

Premiere Date: August 15, 2016 | Runtime: 00:16:46

## Toolkit

Calorimeter Experiment
Unit 8D Note Taking Guide & Segment Questions
Unit 8D Practice Problems 1 Calculating Specific Heat
Unit 8D Practice Problems 2 Heat Calculations
Unit 8D Practice Problems 3 Heat Calculations

## Crosscutting Concepts

Patterns

Observed patterns of forms and events guide organization and classification, and they prompt questions about relationships and the factors that influence them.

Structure and Function

The way in which an object or living thing is shaped and its substructure determine many of its properties and functions.

## Science & Engineering Practices

Analyzing and Interpreting Data

Once collected, data must be presented in a form that can reveal any patterns and relationships and that allows results to be communicated to others. Because raw data as such have little meaning, a major practice of scientists is to organize and interpret data through tabulating, graphing, or statistical analysis. Such analysis can bring out the meaning of data—and their relevance—so that they may be used as evidence.
Engineers, too, make decisions based on evidence that a given design will work; they rarely rely on trial and error. Engineers often analyze a design by creating a model or prototype and collecting extensive data on how it performs, including under extreme conditions. Analysis of this kind of data not only informs design decisions and enables the prediction or assessment of performance but also helps define or clarify problems, determine economic feasibility, evaluate alternatives, and investigate failures. (NRC Framework, 2012, p. 61-62)

Planning and Carrying Out Investigations

Students should have opportunities to plan and carry out several different kinds of investigations during their K-12 years. At all levels, they should engage in investigations that range from those structured by the teacher—in order to expose an issue or question that they would be unlikely to explore on their own (e.g., measuring specific properties of materials)— to those that emerge from students’ own questions. (NRC Framework, 2012, p. 61)

## Vocabulary

absolute zero - the temperature at which all molecular motion stops and entropy is zero.

calorimetry - a method of measuring the quantity of heat transferred in a process.

chemical thermodynamics - the study of energy changes that accompany chemical reactions or physical changes in the state of matter; also known as thermochemistry.

endothermic - describes a process that takes in or absorbs energy from its surroundings.

enthalpy - a thermodynamic quantity equivalent to the total heat content of a system.

entropy - the measurement of energy dispersal.

exothermic - describes a process that produces or gives off energy to its surroundings.

first law of thermondynamics - the amount of energy in the universe is a constant. Energy can be transferred from one substance to another or transformed into other forms of energy, but it cannot be created or destroyed.

heat - the transfer of energy from a warmer object to a cooler object; also known as thermal energy.

joule - the SI unit of measure for energy, abbreviated J.

second law of thermodynamics - energy always disperses from a more usable form of energy to a less usable form.

specific heat capacity - the heat needed to raise the temperature of one gram of a substance by one degree Celcius.

surroundings - everything around the system, i.e. air, water, packaging, etc...

system - the chemical reaction or physical process being monitored.

temperature - a measurement of the average kinetic energy or molecular movement in an object or system.

thermal conductivity - a measure of the ability of a material to transfer heat.

third law of thermodynamics - the entropy of a system at absolute zero is zero.

## Georgia Standards of Excellence

SC5Obtain, evaluate, and communicate information about the Kinetic Molecular Theory to model atomic and molecular motion in chemical and physical processes.

SC5.aPlan and carry out an investigation to calculate the amount of heat absorbed or released by chemical or physical processes. (Clarification statement: Calculation of the enthalpy, heat change, and Hess’s Law are addressed in this element.)

SPS7Obtain, evaluate, and communicate information to explain transformations and flow of energy within a system.

SPS7.bPlan and carry out investigations to describe how molecular motion relates to thermal energy changes in terms of conduction, convection, and radiation.

SPS7.cAnalyze and interpret specific heat data to justify the selection of a material for a practical application (e.g., insulators and cooking vessels).

SPS7.dAnalyze and interpret data to explain the flow of energy during phase changes using heating/cooling curves.

S8P2Obtain, evaluate, and communicate information about the law of conservation of energy to develop arguments that energy can transform from one form to another within a system.

S8P2.dPlan and carry out investigations on the effects of heat transfer on molecular motion as it relates to the collision of atoms (conduction), through space (radiation), or in currents in a liquid or a gas (convection).

## Request Teacher Toolkit

The Chemistry Matters teacher toolkit provides instructions and answer keys for labs, experiments, and assignments for all 12 units of study. GPB offers the teacher toolkit at no cost to Georgia educators. Complete and submit this form to request the teacher toolkit. You only need to submit this form one time to get materials for all 12 units of study.