Ammonium Chloride + Water. WALT – Explain what an endothermic reaction is and the factors that affect an Endothermic reaction. Exothermic. Endothermic. Chemical reactions where HEAT…. Is transferred to the surroundings…. ID: 525516
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Endothermic Reaction Investigation – Ammonium Chloride + Water
WALT – Explain what an endothermic reaction is and the factors that affect an Endothermic reaction
Slide2Exothermic
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.
Slide3Ammonium Chloride + Water
What happens when you mix the 2?Take the temperature before and then after
http://www.youtube.com/watch?v=GQkJI-Nq3Os
Slide4You have – various amounts of Ammonium Chloride
0.5g
1.0g
1.5g
2.0g
2.5g
3.0g
Measuring cylinder, thermometer and beaker
Slide5How can you design an investigation to maximise the reduction in temperature ?
Using the equation
Ammonium Chloride + Water
Slide6Amount 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.
Slide7Answer 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?
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