This is the calorimeter we have

What is the purpose of a calorimeter?

Engineering a calorimeter How does it work?

What can we calculate using the calorimeter? 1. heat energy (q) released by fuel =heat energy absorbed by the water

q(fuel)

=

q(water)

=

How much error was there using this calorimeter?

2. heat of combustion

(q / gram of fuel ). J/g

- experimental value l x accepted (known)value

(mwater)(Cpwater )(ΔT water)

in our experiment we got _______________________

for paraffin

in our experiment we got________________________ for ethanol

Percent error = l accepted (known) value

In our experiment we got ____________ for paraffin (C25H54)

Our percent error was _____________ for paraffin Our percent error was ___________________for ethanol

and __________________ for ethanol (C2H5OH) Is

What caused the percent error to be so high? calorimeter reasons

other reasons

How can this calorimeter be improved?

this a good percent error? ______________

How will we know if we achieved our goal ?

100%

The Engineering Design Process

Step 1

Identify the problem and the criteria

Problem

Step 3 Develop Possible Solutions (Brainstorm) May be with words or pictures. Discuss solutions

Step 6

Test and Evaluate your Model

Compare its performance to the old model. old design

new design

Criteria

Step 4 Select and draw out the design you want

Step 2 Research the Problem list some websites / facts

Step 5 Construct a model to test

(May be a combination of possible solutions)

(Bring in materials and build) Take a picture.

Step 7 Communicate your Results

Step 8 Redesign Your Product

(Do

(How could it be further improved?)

this with a drawing or a powerpoint slide or video)