Question

Refer to the image of a freshly baked cake.

(a) Is baking a physical or chemical change?

(b) Is it a reversible or irreversible change?

(c) Is baking an endothermic or exothermic change?

Answer 1

(a)

• The ingredients in a cake undergo a chemical transformation when they are baked.
• When the molecules that makeup two or more compounds are rearranged to form a new substance, this is called a chemical change
• You have a variety of ingredients when you start baking.
• The flour, egg, sugar, and other ingredients

(b)

• Baking a cake is a chemical and irreversible transformation because once the raw materials have been chemically changed during baking, they cannot be reversed.

(c )

• Baking a cake is an endothermic chemical reaction or change.
• The reactions in which heat is absorbed are called endothermic reactions
• The heat aids in the formation of air bubbles in the cake, making it light and fluffy.