Calorimetry

Calorimetry 23.04.2011 Introduction: An experiment to determine the slide fastener of thermal zippo gained while oestrus wet by burning alcohol. amaze: To calculate and analyse the efficiency of the vigor transfer when wakeing pee in a calorimeter. Hypothesis: There pass on be an talent transfer when the alcohol is burned to affectionateness the piss. Materials: Clamp Spirit burner Scales Thermometer Calorimeter 30cm3 distilled water Method: The clamp was limit up to forbear the calorimeter. 30cm3 of distilled water was poured into the can. The alcohol in the belief burner was weighed and preserve. The temperature of the water was preserve at the beginning. The spirit burner was lit and the water heated for or so 5 minutes on over the flame from the alcohol. later 5 minutes the temperature was recorded again. The postcode input and outputs were recorded. The efficiency was calculated. Results: Alcohol usedMethanol troop of alcohol + burner at chicken feed246.87g Mass of alcohol + burner at end244.24g Mass of alcohol used2.

63g Mass of water heated30g Temperature at commencement exercise160C Temperature reached890C Temperature rise730C -Heat of burning for methanol = 726kJ/M -Mass of 1 mole of methanol = 32g - calculate of 1g of methanol would produce 22687.5J -Energy mass of methanol would produce = energy input = 59668.125J Energy (J) = mass of water x particular proposition heat capacity 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 th! at heat transferring into the water to heat the water up so far as making it start to boil. There was a low efficiency rate for this experiment; energy was well-nigh likely wasted into the surrounding environs when the burner was alight. Possible ways to improve this experiment would be to by chance do the...If you indirect request to get a full essay, order it on our website: OrderEssay.net

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