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ACTIVITY Weigh 0.5 g of 3 pieces for each of the listed foods. Place 10 mL of water in a test tube mounted component of the system. Measure the water temperature and record in the table below. Attach one of the pieces of food in the pin and hold this with a pinch of wood. Ignite the piece of food with the flame of a match and place rapidly within the cylinder, causing the flame reaches directly the test tube. When complete combustion measure the temperature of the water, stirring gently prior to reading. Write the temperature in the table. Where did the energy that raised the temperature of the water? Repeat steps (2) to (5), with the other food pieces, removing water in the test tube at all times. 01 Complete the table by filling in the third. and 4th. Column, To fill the third. Column, calculate the difference: (Final temperature) - (initial temperature) To fill the fourth. Column, calculate the arithmetic average of the three values found in the third. Column for each food. All foods have had, on average, the same temperature increase? How to interpret this result? How Many Calories (cal *) were contained in food burned? Remember what is a calorie? The quantity of heat required to increase the temperature 1 ° C from 1.0 g of water. Lem- bre up to 1 Kcal = 1000cal * = 4.18 KJ. To calculate the amount of heat that water received in the burning of each food, it is necessary to multiply the mass of water (10 ml corresponding to 10g, since the water density is very close to 1.0), the mean T (difference temperature) obtained for each food. With this, one obtains the amount of heat released by 0.5 g of food. To determine the amount of heat released per gram of food, is multiplied by 2, and put the data in Table 02.
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AKTIVNOST Vaganje 0,5 g 3 komada za svaku od navedenih namirnica. Mjesto 10 mL vode u epruveti ugrađena komponenta sustava. Izmjerite temperaturu vode i zapis u tablici u nastavku. Pričvrstite jedan od komada hrane u pin i držite ovo s trunkom drva. Ignite komad hrane s plamen brzo utakmicu i mjesto unutar cilindra, što uzrokuje plamen doseže izravno u epruvetu. Kad potpunije izgaranje mjeriti temperaturu vode, miješajući lagano prije čitanja. Napišite temperaturu u tablici. Gdje je energija koja podiže temperaturu vode? Ponoviti korake (2) do (5), s druge hrane komada, uklanjanje vode u epruveti u svakom trenutku. Ispunite tablicu popunjavanjem treći. Stupac, Za popunu treći. U koloni, izračunali razliku: (Final temperatura) - (početna temperatura) Za popunjavanje četvrtog. U koloni, izračunati aritmetički prosjek tri vrijednosti koje se nalaze u trećem. Stupac za svaku hranu. Sve namirnice su imali, u prosjeku, isti porast temperature? Kako protumačiti ovaj rezultat? Koliko kalorija (cal *) su sadržane u hrani spalio? zaboravite ono što je kalorija? Količina topline potrebno povećati temperaturu 1 ° C s 1,0 g vode. Lem- bre up na 1 Kcal = 1000cal * = 4.18 KJ. Da biste izračunali količinu topline da voda dobila u spaljivanju svake hrane, potrebno je pomnožiti masu vode (10 ml odgovara 10g, budući da je voda gustoće je vrlo blizu 1,0), znači T (razlika Temperatura) dobiven za svaku hranu. Uz to, dobiva se iznos od oslobođene topline za 0,5 g hrane. Da biste utvrdili količinu oslobođene topline po gramu hrane, množi dva, i staviti podatke u tablici 02.