Required Practical: Investigating Temperature Changes (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Flashcards

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Required Practical: Investigating Temperature Changes
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Vol. of HCl used in experiment

25 cm3^3

Starting temp. of HCl

25°C

Container used for reaction

Polystyrene cup

Purpose of polystyrene cup

Minimises heat loss to surroundings

Mass of Mg added

1 g

Form of Mg used

Powdered magnesium

Temp. measurement frequency

Every 30 seconds

Total experiment duration

5 minutes

HCl concentration increase per repeat

0.2 g/dm3^3

Starting HCl concentration

0.2 g/dm3^3

Final HCl concentration

1.0 g/dm3^3

Temp. change in exothermic reaction

Temperature increases

Energy change in exothermic reaction

Releases energy

Temp. change in endothermic reaction

Temperature decreases

Energy change in endothermic reaction

Absorbs energy

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Exothermic & Endothermic Reactions

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Exothermic & Endothermic Reactions

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Exothermic & Endothermic Reactions

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Exothermic & Endothermic Reactions

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