lab report

The righteousness of conversation of heat energy Objective: To add up calefactive and dusty liquid together and predict the temperature of the pastiche. Equipment/Materials: Styrofoam transfuse, plenty scale, Procedures: 1.Take a dry Styrofoam instill mass the loving cup and record. 2.Pour about 50 mL to 60 mL mothy seduce in the cup. commode the cup + dust-covered H2 O. Record. 3.Take the temperature of frosty H2 O and record. 4.Take about 90 mL to 100 mL of virulent body of water. 5.Record the temperature of hot H2 O. 6.Mix the hot water with cold water. Stir piano and take the temp of the miscellanea. 7.Record the mass of the cup + cold H2 O+ hot H2 O. 8.Clean up work area. information: aggregative of Styrofoam = 3.9g Temperature of cold water = 21̊C rush of Styrofoam cup + cold water = 52.9g Temperature of hot water = 72̊C mickle of Styrofoam cup + cold water + hot water = 142.1g Temperature of the mixtu re = 51̊C Calculations: 1.Calculate the mass of cold water. Mass of cup + cold water mass of Styrofoam 52.9g 3.9g = 3.0g 2.Calculate the mass of hot water. Mass of Styrofoam cup + cold water + hot water - Mass of cup + cold water 142.1g 52.9.9g = 89.2g 3.Calculate the temperature of the mixture by applying the law of converstion of heat and energy: (m ∆T Cp)cold water =(m ∆T Cp)hot water (49.0g)(x-21)̊C (4.184 J/g ̊C) = 89.2g (72-x)̊C (4.184 J/g ̊C) 49.0x 1029 = -89.2x + 6422.4 +89.2x +89.2x 138.

2x 1029 = 0 + 6422.4 + 10! 29 +1029__ 0 7451.4 138.2x= 7451.4 138.2 138.2 X=53.9̊C 4. Find the % error. (Real #) - ( your #) x 100 = % error (Real #) (53.9̊C) - (51̊C) x 100 = 5.3% (53.9̊C) Conclusion: The percentage error in this experiment was 5.3%. The reasons for experimental errors are: raise up disadvantage to the surroundings. ...If you want to get a full essay, tell apart it on our website: BestEssayCheap.com

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