Question

take two test tubes, half filled with water. To the first test tube, add salt and to the second add quicklime. what do you observe? is there a release of energy? comment​

Answer 1

Answer:

In the secound test tube heat will be released since exothermic reaction will take place the reaction involved is

CaO+H2O------->Ca(OH)2+heat

Explanation:

Answer 2

Answer: In the first test tube there is no relase of energy.

But in the second there is release of energy.

Explanation:

1. When salt is added to the water there is simple dissolution reaction and it creates a homogeneous mixture.

2. When quick lime (calcium oxide) is mixed with water, a combination reaction takes place and calcium hydroxide is formed, which is an exothermic reaction, i.e., the reaction is accompanied by release of energy. So, the test tube becomes hot due to release of heat energy.