the energy released when 1 g of a material is combusted measured by calorimetry calor is the Latin word for heat metria is the Greek word for to measure ID: 1040872
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1. Food and Fuelfuel value: the energy released when 1 g of a material is combusted-- measured by calorimetry calor is the Latinword for “heat”metria is the Greekword for “to measure”
2. FoodThe body runs onglucose, C6H12O6.-- When it is in the blood stream, glucose is called… “blood sugar.”-- Our bodies produce glucose out of the foods that we consume. With food intake,blood sugar increases;with physical (or mental)activity, it decreases.Insulin is the hormone that moves glucosefrom the blood stream into the cells.Diabetics must closely monitorblood sugar levels and take insulinto keep that level within range.
3. carbs: 4 kcal/g; quickly broken down into glucose; not much can be stored as carbs fats: 9 kcal/g; broken down slowly; insoluble in water; easily stored for future useproteins: 4 kcal/g; contain nitrogen which ends up as urea, (NH2)2CO after digestionH–N–C–N–HHHO
4. Fuelfossil fuels: coal, petroleum, natural gas-- products of what used to be living things -- nonrenewable coal-burning power plantFuture oil suppliesare in question.
5. -- most impurities (e.g., sulfur compounds) are easily removed in this process -- the fuel gases can be transported by pipeline and then burned for fuel Combustion of ANY fuelcontributes to the greenhouse effect.coal gasification: coal is treated with superheated steam to make the gases CH4, H2, and COcoal gasification plant
6. Nuclear energy, from the splitting or fusing of atoms, also is nonrenewable.-- a lot of bang for your buck, but there is the problem of hazardous waste disposal FISSIONdaughternucleireleasedneutronscooling towerscontainment buildingU or Pu
7. Renewable energy sources include:solar wind solar panelswind generators
8. geothermal hydroelectric biomass geothermal plant in Icelandbiomass plant in Britaincrops, biowaste
9. for energy or reacted together to get the heat back.Solar heating can be used to generateCO and H2 gases, which could be burned... from + CH4 + H2O CO + H2heatSunSolar (or photovoltaic) cellsdirectly convert solarenergy into electricity. Problems with solar energy: -- it is dilute-- it fluctuates w/time of day and weather conditions-- storing it for later use