How Hot Is It? Calorimetry Lab

AgendaIntroduction/concept refresherTeacher demoDo the experimentReport your results to meFinish Calorimetry Handout/lab questions

MaterialsGOGGLES1 penny25ml waterBunsen Burner

+ Hose

Scales

Tongs50 or 100ml

plastic beakerCalorimeter

2 Cups/half CupCup/Insulating

sleeve/lidThermometer

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

bunsen burnerIt’s not very effective to hold a thermometer in

the flame – it is also not very safeThis 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

beaker2. Place the beaker inside the calorimeter3. Set up calorimeter and measure the initial

temperature of the water

4. Weigh the penny5. 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 scarvesDon’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

PanayiotaDennecia and

GarnetDylan and NeerajManjima and Billy

Nafis and Danielle

Michael and Saleh

Justin and ChrisRastko and

ErtugrulLucy and Lauren

Groups - Day 1 Per 2Saad and ChristalChester and

SabbirCalvina and PaulLisa and AnuragSandra and

AhmadVarshini and

AidanSuthan and

Nishanthan

Ryan and KevinAndre and AudreeShefat and

AnusanTyrell and VictorJanelle and

AnandaGeerthan and

AaronFabiha and

Benozir