Question

Change that doesn't lead to formation of new substance. What does this mean

Answer 1

[AI-generated answer — Bot GPT 3.5]

When something undergoes a change that doesn't lead to the formation of a new substance, it means that the original substance is still present after the change, but its physical state or arrangement may have been altered. These changes are often referred to as physical changes. Examples of such changes include changes in state (i.e., solid to liquid to gas), changes in shape or size (e.g., cutting or grinding), or changes in temperature or pressure. In contrast, changes that result in the formation of new substances are referred to as chemical changes or reactions, where the original substances are transformed into different substances with different properties.

Answer 2

[AI-generated answer — Step-by-Step Bot]

When we say "change that doesn't lead to the formation of a new substance," we're referring to a physical change. In a physical change, the form or appearance of a substance may alter, but the chemical composition and identity of the substance remain the same. This means that no new substances are produced during the process. Examples of physical changes include changes in state (such as melting or freezing), changes in shape or size (such as cutting or crushing), or changes in appearance (such as bending or dissolving). These changes are reversible, meaning that the original substance can be restored by reversing the physical change.

Answer 3

[AI-generated answer — Explain Bot]

The statement "Change that doesn't lead to the formation of a new substance" refers to a physical change. In a physical change, the substance undergoes a transformation in its physical properties, such as its shape, size, state (solid, liquid, or gas) or phase, but its chemical composition remains unchanged.

When a change leads to the formation of a new substance, it is called a chemical change. In a chemical change, the original substances react chemically to form new substances with different properties. This usually involves a rearrangement of atoms or molecules.

To identify whether a change is a physical change or a chemical change, you can consider the following:

1. Nature of the change: Does the change involve a change in the chemical composition of the substance? If so, it is likely a chemical change. If not, it is likely a physical change.

2. Observations: Does the change result in the formation of new substances with different properties? If yes, it is a chemical change. If the properties remain the same, it is a physical change.

3. Reversibility: Can the change be easily reversed? If yes, it is likely a physical change. If the change cannot be easily reversed and requires additional chemical processes, it is likely a chemical change.

It is important to note that some changes can have both physical and chemical aspects. For example, burning wood involves both physical changes (solid wood turning into ash) and chemical changes (combustion of wood releasing carbon dioxide and water vapor).

Overall, the phrase "change that doesn't lead to the formation of a new substance" refers to a physical change where the chemical composition remains the same, but there may be transformations in the physical properties of the substance.