EXAMPLE LAB REPORT #1

I.M. Chemist
10-2-80

HEAT OF COMBUSTION BY BOMB CALORIMETER

In the experiment we will find the heat of combustion of naphthalene.

Condensed Directions

1. Determine heat capacity of calorimeter by burning a sample of benzoic acid.

2. Repeat procedure with "unknown".

Constants - Other Useful Data

Heat of combustion of benzoic acid 6318 cal/g

(from manufacturer, Parr)

Heat of combustion of Wire 2.3 cal/cm

(from manufacturer, Parr)

References

Cockford, Nowell Baird, Getzen Laboratory Manual of Physical Chemistry, 2nd ed., Wiley, p. 109

Myers, handout

Equations

(mass sample) (DH_comb) + (cm wire)(2.3 cal / cm) = C x DT

Known: Benzoic Acid

wt. container 1.4090 g

length wire burned = 4.1 cm

sample + cont. 2.5046 g

wt sample 1.0959 1.0956 g

Sample:  Naphthalene

container wt. 1.4838g

wire burned = 6.7 cm

container + sample 2.4564g

0.

sample weight 0.9726g

I.M. Chemist
10-2-80