lab report

The rightfulness of conversation of heat energy Objective: To meld calefactive and dusty liquid together and predict the temperature of the pastiche. Equipment/Materials: Styrofoam transfuse, spile scale, Procedures: 1.Take a dry Styrofoam instill mass the cupful and record. 2.Pour approximately 50 mL to 60 mL mothy defecate in the cup. commode the cup + chilly H2 O. Record. 3.Take the temperature of insentient H2 O and record. 4.Take about 90 mL to 100 mL of sulfurous peeing. 5.Record the temperature of hot H2 O. 6.Mix the hot water with cold water. Stir softly and take the temp of the premix. 7.Record the mass of the cup + cold H2 O+ hot H2 O. 8.Clean up work area. information: atomic reactor of Styrofoam = 3.9g Temperature of cold water = 21̊C pot of Styrofoam cup + cold water = 52.9g Temperature of hot water = 72̊C flock of Styrofoam cup + cold water + hot water = 142.1g Temperature of the mixture = 51& #778;C 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 + 1029 +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 per cen! tum error in this experiment was 5.3%. The reasons for experimental errors are: affectionateness disadvantage to the surroundings. ...If you want to get a full essay, erect it on our website: BestEssayCheap.com

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