11) What was one source of missing or unaccounted for Q7 12) What was a second a
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11) What was one source of missing or unaccounted for Q7 12) What was a second additional source of missing or unaccounted for Qr? 13) How would the calculated fame T be affected if you splashed water out of the cups when adding the meta? a) The calculated flame temperature would have been lower. b) The calculated flame temperature would have been higher c) The calculated flame temperature would have been unaffected 14) How would the calculated flame T be affected if you started with warmer water in the cups? a) The calculated flame temperature would have been lower. b) The calculated flame temperature would have been higher c) The calculated flame temperature would have been unaffected 15) How would the calculated flame T be affected if you used a metal cup instead of a Styrofoam cups? a) The calculated flame temperature would have been lower b) The calculated flame temperature would have been higher c) The calculated flame temperature would have been unaffected. 16) How would the calculated flame T be affected if you used a thermometer that displayed a T The calculated flame temperature would have been lower The calculated flame temperature would have been higher The calculated flame temperature would have been unaffected a) c) 17) Explain why a group that used heated tongs would have a more accurate answer for the T of the flame 18) Describe how the lab and the results would change if the metal used were tungsten. 19) How couid you alter the experiment to improve its potential accuracy?Explanation / Answer
1. One source of missing Q, could be environmental factors mainly the temperature of the room which could imply some heat loss by convection.
2. A second source of missing Q, could be the time you took to measure the temperature you want, there are 3 ways for heat transfer (or lost) conduction, convection and radiation, so if you take too much time to make your measurements the probability of heat lossing by any of this mechanisms increases dramatically. (An ideal factor would be to be able to have an inmediate heat exchange in order to minimize heat losses but this is very hard to get in real life)
3. If you splashed some water out of the cups the total mass of water will be reduced (depending o how much you splashed), then we can predict that the final temperature would be higher than the original 60 C you reported if you make heat calculation you would get (if you didnt measure the actual water in your system) a higher value of Q than the one you calculated, so to get a higher value of Q you would get a higher value of Temperature that provided that heat. Calculated flame temperature will be higher
4. If you started with warmer water in the cups then that would mean that you measured the temperature of that water, so you would get a higher final temperature than the 60C but according to energy conservation law the heat will be the same, since the mass is the same, heat capacity is the same we can predict that you will get the same delta T( delta T = 40) it doesnt matter the temperature that you are starting with, the delta T will be the same in order to keep the same heat value, so the answer is that you will get the calculated flame temperature will be unnafected
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