Energy In A Peanut LAB - Mr. Macha's Class Website
Name:Hour:Date:Energy in a Peanut LAB71 pointsLEARNING GOAL: Determine the stored (potential) energy in a peanut.BACKGROUND: Calories that are counted in our everyday diet are based upon the same unitsof heat that measure the potential energy stored within chemical bonds. As substances react,chemical bonds are broken and reformed. During this process, energy is released. The amount ofreleased energy is measured in calories and is dependent upon the original energy content of thereactant bonds. Foods that are high in calories have chemical bonds that when rearranged giveoff large amounts of energy. When a high-energy bond is broken, a large amount of energy isreleased. If the body can't use all of this energy, it stores the excess within the chemical bonds offat.There are two types of calories: scientist calories and nutritionist calories. Whenscientists speak of calories they are talking about the amount of heat it takes to raise thetemperature of water. One calorie to a scientist is the amount of heat energy it takes to raise thetemperature of 1 gram (or 1 milliliter) of water up 1 ºC. A thousand calories is called akilocalorie (kcal) and is the amount of heat energy needed to raise a 1,000 grams (or 1 liter) ofwater up 1 ºC.1 calorie the amount of heat energy it takes to raisethe temperature of 1 gram of H2O by 1 ºC1 kilocalorie (kcal) 1,000 kcal1 Food Calorie 1 kcal 1,000 “little” caloriesWhen nutritionists speak of calories or when you look up the number of calories on a food labelit is actually telling you the number of kilocalories that the food contains. For this reason, whenspeaking of calories in food we will use an uppercase “C”. So, one Calorie is equal to 1kilocalorie which is equal to 1000 calories (lowercase "c").CAUTION: If you are allergic to peanuts inform your teacherimmediately BEFORE doing this activity. If any of the peanuts you areworking with are allergic to you, then also inform the teacherimmediately.MORE PRE-LAB QUESTIONS:1. What is the difference between “scientist calories” (cal) and “nutritionist calories” (Cal)?2. A food label reads “80 Calories”. How many “scientist calories” are in the food?3. Where is the potential energy in food stored?1Macha
THE PEANUT TEST: To determine the calorie content of a particular food, its stored bond energy mustbe liberated and measured. This energy is released as heat and is transferred to water. As the waterabsorbs the heat, its temperature rises. By knowing the mass of burnt food, the volume of water, and thechange in the water’s temperature, you can determine the calories per gram of the burned food.NOTE: Physical scientists define one calorie as the amount of heat needed to raise the temperature of onegram of water by one Celsius degree.MATERIALS:Large test tubeTest tube holderRing standPeanutGraduated cylinderClay or paper clipStrikerBunsen BurnerThermometerLaboratory balanceWater (maintained at room temperature)Safety gogglesPROCEDURE:1. Review all safety precautions associated with the use of an open flame with yourinstructor.2. Put on your safety goggles. Use a graduated cylinder to pure 10 mLs of water intoa test tube.3. Secure the tube in a fixed test tube holder.4. Obtain the mass of an unshelled peanut. Record this value.5. Carefully pierce the peanut with a needle.6. Anchor the free end of the needle into a lump of clay, as seen in the DIAGRAM.7. Measure the temperature of the test tube water in degrees Celsius. Record thisvalue as the initial temperature.8. With your instructor’s approval, light a Bunsen burner.9. Once the Bunsen burner is burning, use it to set the peanut on fire.10. Once the peanut has started burning, position it directly beneath the water filledtest tube.NOTE: when re-igniting the peanut, slide it away from the test tube in order toprevent the candle’s heat from warming the water.11. When the peanut has stopped burning, retake the temperature of the water. Record this value.12. Pour out the test tube water into a graduated cylinder. Record this volume.13. Place the burnt peanut on the balance and determine its end mass.14. Calculate the stored energy in a peanut.2Macha
Food12Initial Mass (mi) (g)Final Mass (mf) (g)Mass of Food Burned(mi – mf) (g)Volume of Water(mL)Mass of Water (m) (g)Initial Temperature(Ti) (ºC)Final Temperature(Tf) (ºC)Temperature Change( T Tf – Ti) (ºC)3Macha34
Name:Hour:Date:1. FOOD 1a. Calculate the energy released by food 1.(energy released by food energy gained by the water) (J) Q mcΔTb. Convert the energy released by food 1.(J cal Cal) (Cal)c. Calculate the amount of energy released per gram of food.(energy release by food mass of food burned) (Cal/g)2. FOOD 2a. Calculate the energy released by food 2.(energy released by food energy gained by the water) (J) Q mcΔTb. Convert the energy released by food 2.(J cal Cal) (Cal)c. Calculate the amount of energy released per gram of food.(energy release by food mass of food burned) (Cal/g)4Macha
3. FOOD 3a. Calculate the energy released by food 3.(energy released by food energy gained by the water) (J) Q mcΔTb. Convert the energy released by food 3.(J cal Cal) (Cal)c. Calculate the amount of energy released per gram of food.(energy release by food mass of food burned) (Cal/g)4. FOOD 4a. Calculate the energy released by food 4.(energy released by food energy gained by the water) (J) Q mcΔTb. Convert the energy released by food 4.(J cal Cal) (Cal)c. Calculate the amount of energy released per gram of food.(energy release by food mass of food burned) (Cal/g)5Macha
MORE PRE-LAB QUESTIONS: 1. What is the difference between “scientist calories” (cal) and “nutritionist calories” (Cal)? 2. A food label reads “80 Calories”. How many “scientist calories” are in the food? 3. Where is the potential energy in food
COMPETITIVE ANALYSIS ACTS is the first peanut butter company to mix toppings into its peanut butter. Direct competitors consist of the major peanut butter brands: JIF, Skippy, Peter Pan, Justin’s and Peanut Butter & Co. The closest product to ACTS is Peanut Butter & Co, which makes flavored
Peanut shells were obtained by removing fruits inside the peanut. Firstly, peanut shells were crushed into powder by a tiny plant crusher followed by drying at 80 C for 24 h. Then the peanut shell powder was transferred to a crucible and heate
Peanut Butter & Cupcake By Terry Border / ISBN: 978-0-399-16773-7 Lesson Author Erin A. Yetter, Ph.D., Federal Reserve Bank of St. Louis–Louisville Branch Standards and Benchmarks (see page 10) Lesson Description In this lesson, students hear a story about Peanut Butter, a slice of bread with peanut butter on it, who is looking for a friend.
A. Because peanut butter is a low-quality food, consumers will not buy it. B. When the supply of peanut butter falls, its price falls. C. When consumer incomes increase, the demand for peanut butter decreases. D. Producers of peanut butter will switch to producing jelly, a complement, to increase profits. E.
CURRENT PEANUT SITUATION Weather and crop update Determining peanut maturity Irrigation termination LATE SEASON DISEASE MANAGEMENT Fungicide considerations for leaf spot Sclerotinia blight and Verticillium wilt September 2012 Volume 6, Issue 4 Classification of the 2012 Texas peanut crop. 0 4
Peanut Producers Guide This guide will focus on: Long and short-term planning and preparation to mitigate the impacts of hurricanes on peanut production Potential impacts of wind and water on peanut production
process. About 250,000 jars are produced daily, at the largest peanut butter plant. This article is going to describe in detail, the manufacturing process of peanut butter. Raw Materials After production, about 90% of peanut butter consists of peanuts that have been careful
1.25 oz Custom Peanut Butter Precut Frozen Cookie Dough Best Brands Corp. 18.75 lb case, 240 . Chocolate Peanut Butter Cup 1442 (Man. on 11/6/08) . Harvest Peanut B
