Which of the following does NOT indicate change may have taken place? . . A - Fracture Formation. B - Gas Production . C - Precipitate Formation . D - Energy Transfer. . What happens to matter during a chemical reaction? . . A - Matter is neither destroyed or created. B - Some matter is destroyed. C - Some matter is created. D - Some matter is destroyed and some is create

In chemistry, there are two basic types of change, these are physical and chemical changes. While physical changes are reversible, chemical changes are not and they are often accompany by production of gas, production of precipitate, transfer of energy, etc. Fracture formation, which refers to separation of joints or faults during geologic formation does not indicate that any change has taken place. What occur in fracture formation is separation.

2. During chemical reaction, A MATTER IS NEITHER CREATED NOR DESTROYED.

The law, which states that 'matter is neither created nor destroyed' is called the law of conservation of mass. The law was discovered by Antoine Lavoisier in 1785. The implication of the law is that, although during chemical reactions, the quantity of matter in substances can be rearranged or changed from one state to another state, but the mass of the mater remain constant at the end of the chemical reaction.

mariejoepagaduan mariejoepagaduan · Answer 2 · 2019-08-07T18:56:27+02:00

Fracture formation does not indicate a chemical change has taken place.

During a chemical reaction A) matter is neither created or destroyed.

FURTHER EXPLANATION

A chemical change is a change in the chemical makeup of a substance. The properties of the substance also changes. Since new substances are formed, chemical changes are usually irreversible by ordinary means. Some may be reversed but by undergoing other chemical changes or chemical reactions. Physical change, on the other hand, is a change in the physical properties of substances such as appearance, size, or shape. Changes in state (solid, liquid, gas) are also physical changes. The substance does not change into something new.

Evidence of Chemical Change

To know if a chemical change has occurred, below are some indicators or signs to watch out for:

1. Evolution of Gas or Effervescence

Some reaction produce gas which are shown by the formation of bubbles. Vigorous gas formation is seen as effervescence or fizzing.

2. Evolution of Light

Some substances produce light when combined with another substance. Burning is an example where light or flame is produced.

3. Evolution of Heat

In the process of forming new substances energy is absorbed and released during bond-breaking and bond-forming. Some processes result in a net release of heat. These are exothermic processes. Sometimes, a net absorbance of heat is observed for endothermic processes. When a container gets hot or when it gets cold, this could be an indication of energy transfer from the surroundings to the system (substances).

4. Change in color, odor

Since new substances are formed, changes in physical appearance might also be visible. However, when changes in color are seen, it is not automatically considered a chemical change. There should be other more definitive signs of chemical change like the ones mentioned above.

Chemical Reactions

Chemical changes often occur when substances undergo a chemical reaction. In chemical reaction, atoms of the starting substances or reactants rearrange to form new substances called the products.

Chemical reactions obey the Law of Conservation of Matter which states that matter only rearranges in chemical reactions. Atoms cannot be destroyed or new atoms cannot be created in the process. This is the reason why chemical reactions are presented as balanced chemical equations which show that the number of atoms present before and after the reaction remains the same.

LEARN MORE

Chemical Reactions https://brainly.com/question/202841
Stoichiometry https://brainly.com/question/10513747

Keywords: chemical change, Law of Conservation of Matter