Question

Your friend decides to toast a piece of bread,but leaves it in the toaster too long. The bread is black and the kitchen if full of smoke

Answer 1

the bread is burnt because of the heat energy atoms surrounding the bread because of the energy from the electric toaster.

Answer 2

The blackened toast resulting from over-toasting is a chemical change because it involves the creation of new substances such as carbon, and this change cannot be reversed by physical means.

So, the correct answer is option 2. Chemical change.

Step-by-step explanation:

When your friend leaves a piece of bread in the toaster too long, causing the bread to turn black and fill the kitchen with smoke, this is an example of a chemical change. A chemical change occurs because the high temperature of the toaster causes the bread to undergo combustion, leading to new substances being formed, such as carbon and other compounds.

The change is not reversible by simple physical means, and the properties of the burnt toast are different from the original piece of bread. Similar to how burning a candle results in new chemicals like carbon dioxide and water, the burnt bread has undergone a transformation at the molecular level.

So, the correct answer is option 2. Chemical change.

Complete question:

Your friend decides to toast a piece of bread,but leaves it in the toaster too long. The bread is black and the kitchen if full of smoke

1. Physical change
2. Chemical change