chemistry

CHM 204 Enthalpy of Formation; Hess’ Law

Introduction (3 points)

· Is the purpose/goal clearly stated? / 1

· Are the chemical equations included? / 1

· Is there a description of the method? / 1

Procedure, Data, and Calculations (13 points)

· Does the procedure have an appropriate level of detail? / 2

· Do the measured values have appropriate significant figures and units? / 2

· Are the calculations present and correct?

· Graphs appropriately presented? / 1

· ∆T determined correctly? / 1

· qsurr / 3

· ∆Hrxn / 2

· ∆Hf MgO / 1

· % error / 1

Conclusions (4 points)

· Is there a summary statement that includes numerical results? / 2

· Mention of quality of results (and justification) / 1

· Is there a discussion of error and how it would affect the results? / 1

Overall (5 points)

· Accuracy.

Report Hf for MgO here: / 2

· Header on first page/sign and date bottom of every page / 1

· Were general lab expectations met? (Writing in the notebook as you go, notebook organized and easily followed, dressing appropriately for lab, turning your experiment in

on time, etc.) / 2

Things to look for: clear, concise and organized procedure, errors crossed out with a SINGLE line, calculations clear and easily followed

TOTAL: / 25