Endothermic Reaction Investigation –
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Endothermic Reaction Investigation –

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Endothermic Reaction Investigation –




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Presentation on theme: "Endothermic Reaction Investigation –"— Presentation transcript:

Slide1

Endothermic Reaction Investigation – Ammonium Chloride + Water

WALT – Explain what an endothermic reaction is and the factors that affect an Endothermic reaction

Slide2

Exothermic

Endothermic

Chemical reactions where HEAT…

Is transferred to the surroundings…

Indicated by a RISE in temperatureBreak bonds which releases heat energy.

Chemical reactions where HEAT…Is transferred from the surroundings …Indicated by a FALL in temperatureNeed to make bonds so take in energy, reducing the temperature.

Slide3

Ammonium Chloride + Water

What happens when you mix the 2?Take the temperature before and then after

http://www.youtube.com/watch?v=GQkJI-Nq3Os

Slide4

You have – various amounts of Ammonium Chloride

0.5g

1.0g

1.5g

2.0g

2.5g

3.0g

Measuring cylinder, thermometer and beaker

Slide5

How can you design an investigation to maximise the reduction in temperature ?

Using the equation

Ammonium Chloride + Water

Slide6

Amount Ammonium Chloride (

gm)Vol Water (ml)Keep it ConstantTemp before (C)Temp After (C)Temp Difference (C)0.520ml1.01.52.02.53.0

Add the same amount of water to the

Ammonium

Chloride.

Slide7

Answer in full sentences in your books

What was the best combination for the reduction in temperature in the reaction?

If you were to repeat the experiment what would you

Change?

Keep the same?