Question

A student is preparing to bake a cake at home and places several ingredients on the countertop to use. First he preheats the oven to 175C, then mixes all of the ingredients together. He pours all of the cake batter into 2 pans and bakes for 1 hour. The cake layers are allowed to cool for 15 minutes. Which of the following indicates that a chemical change occurred?

Answer 1

Answer:

baking the cake batter

Explanation:

Baking the cake batter will indicate that chemical change has occurred here. What is a chemical change?

• A chemical change is one in which a new kind of matter is formed.
• It is usually accompanied by energy either evolution or absorption of energy in form of heat or light or both.
• The process is irreversible.
• When the batter bakes, a new substance different from the cake mix is obtainable.
• We cannot get back the ingredient from this baked cake. It is impossible.
• This is good indicator of chemical change.

Answer 2

The chemical change while baking a cake takes place whenever there is a formation of new substance due to either mixing or cooling.

Given data:

The procedure followed by the student to bake the cake is given.

To find:

The step at which the chemical change takes place.

When the cake is baked, then the cake batter will indicate that chemical change has occurred here.  

• A chemical change is one in which a new kind of matter is formed.

• It is usually accompanied by energy either evolution or absorption of energy in form of heat or light or both.  

• When the batter bakes, a new substance different from the cake mix is obtainable.

• We cannot get back the ingredient from this baked cake. It is impossible.  This is good indicator of chemical change.

Thus, we can conclude that the chemical change while baking a cake takes place whenever there is a formation of new substance due to either mixing or cooling.

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