Evidence of a chemical change does NOT include
A) evolving a gas.
B) change in color.
C) change in shape.***
D) change in temperature.
I agree
The evidence of a chemical change does NOT include a change in shape.
To determine the correct answer, we need to understand what is meant by a chemical change. A chemical change refers to a process where new substances with different properties are formed as a result of a chemical reaction. Some common examples of chemical changes include the burning of wood, rusting of iron, or cooking food.
Now, let's consider the options given:
A) Evolving a gas: This can be evidence of a chemical change because the formation of a gas often indicates that a chemical reaction has taken place. For example, when you mix vinegar and baking soda, carbon dioxide gas is produced.
B) Change in color: This can be evidence of a chemical change. A color change often occurs when new substances are formed. An example would be the browning of an apple slice when exposed to air.
C) Change in shape: This is not evidence of a chemical change. Changing the shape or form of a substance does not indicate a chemical reaction. For instance, melting an ice cube into water does not involve a chemical change.
D) Change in temperature: This can be evidence of a chemical change. Chemical reactions often involve the release or absorption of heat. For example, mixing two chemicals can cause the solution to become hot or cold.
Therefore, the correct answer is C) change in shape, as it is not typically evidence of a chemical change.