Question

compare your own group's value with the known value (6.01 KJ/Mol) of delta H fusion

known value H₂O(s) H₂011) Alters= +6.0! QUESTIONS KI/mol 1. a. Compare your own group's value with the known value (see Section 9.6 in McMurry, Fay & Robinson, 7" Ed.) of AH (expressed in joules per mole of water). b. Compare the class average value to the known value (see Section 9.6 in Me Murry, Fay & Robinson, 7" Ed.) of AH (expressed in joules per mole of water). c. Specify three potential experimental errors that would contribute to any discrepancies observed. 2. Assuming that all groups carried out the experiment and associated calculations correctly, which would you expect to agree better with the known value of AH your group's average value or the entire class' average value? Explain.

Answer 1

1. a. I am considering the Igrouping value y A Afusson re Alt fun = 26625/mol of water theortical known auet afful = 6.01 ks) mot of water on compaing Group, valure with known valure we will have a cud of (6.01-2062) x 100 = 65.6905% cul volue 4 6.01 bo take alast areeage value to the known value. Class average value = Allfusion = 5518.17 7/md. known value offesion= 6.01 kg jonot. on comparing these vakres we will have a errd of 601-5.5181 x 100 = 8.18% errol 6.0) C. - - - chance of vaisations in the measuments. temprature wal not specified or controlled. Caliberation, parallax eur.

(3 now considel group average value gang group & we have etd alteady Calculated from Group I Allful = 2062 J/mol. & Comparing with value has a end of 65.69% while if you clay average value, ie Atiful = 5518.77mod & Compoung with known valure of have eral 8. 18-1. now Considering the both All furion values it it better to take the value of a class average one because it is containing an end very less while group one has a average of rely large & so in del to get the better elesult with lest en consider the class average value of at fusion of water.