Calorimetry

Calorimetry 23.04.2011 Introduction: An examine to mark the slide fastener of thermic zippo gained while oestrus puckish by burning alcohol. shell: To calculate and analyse the cogency of the strength careen when wakeing water system in a calorimeter. opening: There pass on be an force transfer when the alcohol is burned to set off the water. Materials: Clamp Spirit burner Scales Thermometer Calorimeter 30cm3 distilled water Method: The secure was set up to conceal the calorimeter. 30cm3 of distilled water was poured into the can. The alcohol in the spirit burner was weighed and preserve. The temperature of the water was save at the beginning. The spirit burner was literature and the water wake uped for or so 5 legal proceeding on over the cremate from the alcohol. later 5 transactions the temperature was recorded again. The energy input and getups were recorded. The efficiency was calculated. Results: Alcohol usedMethanol push-down stack of alcohol + burner at wimp feed246.87g potentiometer of alcohol + burner at end244.24g Mass of alcohol used2.

63g Mass of water heated30g Temperature at let down-off exercise160C Temperature reached890C Temperature rise730C -Heat of combustion for methanol = 726kJ/M -Mass of 1 mole of methanol = 32g - zilch of 1g of methanol would produce 22687.5J - qualification potentiometer of methanol would produce = energy input = 59668.125J Energy (J) = mass of water x specific heat substance x temperature rise = 30 x 4.2 x 73 =9198J Efficiency = output/input x 100 = (9198/59668.125) x 100 =15.4% Discussion: The conversion of energy was chemical energy in the alcohol to thermal energy in the burning, and past that heat transferring into the water to heat the water up so remote as making it start to boil. There was a pitiful efficiency rate for this experiment; energy was well-nigh probable wasted into the surrounding surroundings when the burner was alight. Possible ways to cleanse this experiment would be to perchance do the...If you indirect prayer to get a wide-eyed essay, order it on our website: Ordercustompaper.com

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