2 years ago

Which evidence is an indication that a chemical reaction has occured

Chemistry

2 answers:

Norma-Jean [14]2 years ago

4 0

Answer:

color change

Explanation:

Zolol [24]2 years ago

3 0

Answer:

There are three main indications when a chemical reaction occurs.

1. Energy change.

2. Color change.

3. Formation of new substance, which is the most suitable indication of a chemical change.

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A chemical reaction produces 653 550 kj of energy as heat in 142.3min. calculate the rate of energy transferred in kj per minute

miskamm [114]

We have the value of

Total energy produced in the chemical reaction=653 550 KJ

Time needed=142.3min

To calculate the rate of energy transfer, that is the amount of energy produced per minute.

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