Chemistry Honors: Class 51

Dates

• Period F: Wednesday, May 4th
• Period A: Wednesday, May 4th
• Period B: Wednesday, May 4th

LNB Check

• Submit LNB for check (and grade)

Practice Problem

• A student wants to determine the energy content of a piece of chicken. She takes a 2.5-gram sample and places it into a Bomb calorimeter. A bomb calorimeter doesn’t use water but the calorimeter itself changes temperature with the process. The calorimeter has a heat capacity of 750 J/°C. The chicken is burned completely and the calorimeter raises in temperature a total of 45°C. Determine the energy content of the chicken (Calories).

Lab Recap

• necessary calculations?
• uncertainty factors?
• how to deal with aluminum can?
• NOTE: if running out of space need new LNB [LINK] or  [LINK]

Lab Quiz

• Quiz on the Lab (Class 52)
• will be provided data – get answers
• uncertainty factors
• will collect LNB to start class period
• NOTE: be sure and finish lab parts

Homework

• finish lab in LNB
• study for lab quiz
• NOTE: retake quiz for Energy Quiz = Thursday, May 5th @ lunch