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Give an experimental procedure to show that some chemical reactions gives out heat.

Give an experimental procedure to show that some chemical reactions gives out heat.

Answers

sharon
(i) Put white anhydrous copper sulphate powder to a depth of about 1 cm in a test-tube. Hold
a thermometer with the bulb in the powder. Add water drop by drop. Record the changes of
the thermometer reading.
(ii) Put about 10 mL of strong aqueous copper sulphate solution into a wide test-tube or
small beaker. Support a thermometer with the bulb in the solution. Add magnesium powder,
or ribbon, a little at a time until the blue colour disappears. Note any changes in the
thermometer reading.
(iii) To a little water in a wide test-tube, add concentrated sulphuric acid, drop by drop,
down the side of the tube. Stir gently with a thermometer after the addition of each drop.
Note any changes in the thermometer reading.
sharon kalunda answered the question on April 12, 2019 at 08:53

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