How Hot Is It? Calorimetry Lab

AgendaIntroduction/concept refresher

Teacher demo

Do the experiment

Report your results to me

Finish Calorimetry Handout/lab questions

MaterialsGOGGLES

1 penny

25ml water

Bunsen Burner + Hose

Scales

Tongs

50 or 100ml plastic beaker

Calorimeter 2 Cups/half CupCup/Insulating

sleeve/lid

Thermometer

Why are we doing this?We want to measure the heat produced by the

bunsen burner

It’s not very effective to hold a thermometer in the flame – it is also not very safe

This allows us to measure the energy change indirectly

What energy changes are happening?

Set Up1. Weigh out 25g of water in a 50 or 100ml plastic

beaker

2. Place the beaker inside the calorimeter

3. Set up calorimeter and measure the initial temperature of the water

4. Weigh the penny

5. Hook your bunsen burner up to the gas with a hose

Lab Set up

Safety and Other InstructionsWear goggles any time you are conducting or

near any experiment.

Tie back any long hair/no scarves

Don’t Burn the Calorimeter! – don’t touch the penny or tongs to the styrofoam

Procedure1. Open vents on the burner, light the bunsen burner, try

to get a nice blue flame and inner cone (adjust vents)

2. Take the penny with tongs and hold it in the inner cone of the flame until it reaches thermal equilibrium.

3. Quickly release the penny into the small beaker in the calorimeter. Close the lid and swirl gently/stir with the thermometer.

4. Watch the thermometer and record the temperature when it reaches its highest point.

5. Let water and penny cool to approx room temperature and repeat the experiment 2x for precision

6. To turn off the burner, completely turn off gas supply.

Adjusting the BurnerThe flame should not be very high, hold the

penny at the tip of the inside cone. It is the hottest point.

Make sure the vents are open on the burner

Safety and Other Instructions

The penny is still hot once you take it off the flame!

Instead of using a stir stick you can gently swirl the calorimeter or stir with the thermometer if you do it too vigorously, the water may spill

We will do the experiment THREE times for precision

Groups…

Groups - Day 1 Per 1Roisin and

Panayiota

Dennecia and Garnet

Dylan and Neeraj

Manjima and Billy

Nafis and Danielle

Michael and Saleh

Justin and Chris

Rastko and Ertugrul

Lucy and Lauren

Groups - Day 1 Per 2Saad and Christal

Chester and Sabbir

Calvina and Paul

Lisa and Anurag

Sandra and Ahmad

Varshini and Aidan

Suthan and Nishanthan

Ryan and Kevin

Andre and Audree

Shefat and Anusan

Tyrell and Victor

Janelle and Ananda

Geerthan and Aaron

Fabiha and Benozir