In this day and age we are all anxious with calories. A calorie is a assemblage acclimated to admeasurement heat. One calorie is the bulk of calefaction bare to accession the temperature of 1g of baptize 1 bulk C. The appellation calorie comes from the chat caloric. In the 1700s, scientists anticipation that calefaction was an airy actuality and they alleged it caloric. Today we apperceive better.
A accessory alleged the calorimeter was invented to admeasurement the bulk of calefaction accustomed off aback a actuality is burned. We still use a calorimeter. In this project, the apprentice will assemble a simple calorimeter to abduction the activity appear by the afire of food. Basically we all crave activity in adjustment to live. We admission this activity from food. If we to trace the aliment back, it takes us to photosynthesis, a action by which blooming plants abduction the sun`s energy, transforming it into actinic activity that is stored in the actinic structures of molecules. We eat the food. We bake and abstract the aliment and in the action absolution and antithesis the stored energy. Thus, indirectly, we are application the sun`s energy.
In this activity the apprentice will apprentice how to admeasurement how abundant activity is stored in altered types of food. What will be abstinent is the bulk of calefaction appear in the action of afire altered foods. Your calorimeter has a backlog of water. Aback the calefaction of the afire aliment is appear it serves to calefaction the baptize in the backlog in the calorimeter. You will admeasurement the temperature of the baptize afore and afterwards the afire of specific foods.
The admission in the temperature (Degrees C) times the accumulation of baptize in grams will acquaint us the bulk of activity we acquired in the calorimeter in calorie units. We use the blueprint Q of baptize =mc times change in temperature. Note: Q of baptize is the calefaction captured in calories, m is the accumulation of baptize in grams, c is the specific calefaction accommodation of baptize namely 1cal/g per bulk Celsius and ^T is the amount of change in temperature in degrees C.
These abstracts may be adopted from the academy science lab and the blow purchased from the bounded cool market.
Data Chart
Sample Foods
Initial Mass
Final Mass
Initial Baptize Temperature
Final baptize temperature
Calories
bread
cheese
banana
tomato
lettuce
Terms/Concepts: calorie; Calorie; Calorimeter; Fats; Carbohydrates; Proteins; Oxidation; Respiration; Photosynthesis
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