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Yahoo! Answers: I believe my science teacher told me something wrong today in clThis forum post is dated 09/04/10. If you feel it is old or outdated, please follow up with a question or comment and someone may be able to update it, or reply with newer information if you have it. - Organic Clothing
| Yahoo! Answers: I believe my science teacher told me something wrong today in cl I am in International Baccalaureate Program at my school so are science is pretty advanced. We were doing a lab on Calorimetry and were testing the calories in different foods. It involves lighting the food on fire beneath a beaker of 15 ml of water and measuring the change in temperature the open flame has on the water. We measured the mass of the marshmallows and almonds and stuff before lighting them aflame. Then we measured the ashes of the food after they burned. I found that the mass of the ashes was surprisingly less than the mass we started with. I was thinking Law of Conservation of Mass tells use matter is neither created nor destroyed so where did the matter go. I pondered and realized it was the smoke rising and was like how could I forget that. I told other students of my findings and my teacher blurted out I was wrong. He said the remaining matter was thermal energy in the form of calories. I was always taught previous to this that matter is only converted into matter in a reaction. It is not always directly into energy. I told my teacher that the mass of the smoke would equal the missing mass and he said that the smoke would have little effect on mass. He said most if not all the missing mass was now in the form of thermal energy instead of the smoke. My question is, is he right with the calorie deal or am I right with the smoke and conservation of mass. I think he looks down on me with disgust for one reason. I went to the ghetto middle school so he always objects what I have to say. He gets along real well with the rich white kids but not me the low class poor white kid. There is a little biased and prejudiced going on here. The other day we were talking about hydrocarbons and organic compounds and I was explaining word for word the difference between inorganic compounds with carbon and organic compounds. He called me wrong and looked at me with a level of disgust. When he went to explain it, it was very close what I had just said. Just because I spoke in a different context than him. I liked my |
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