Question

Question 25

2.5 pts
Which of the following statements describes a difference
between a chemical change and a physical change in a
substance?
Tim
Attei
231
o The result of a chemical change is a different
composition; in a physical change, the composition
remains the same.
o A physical change occurs only in elements: a
chemical change occurs only in compounds.
O A chemical change occurs only in elements; a
physical change occurs only in compounds.
The result of a physical change is a different

Answer 1

o The result of a chemical change is a different composition; in a physical change, the composition remains the same.

Step-by-step explanation:

In a chemical change, new kinds of matter are produced although the atoms are the same.

For physical changes, no new kinds of matter formed. Only the state of substances changes.

• Most chemical changes are usually irreversible
• Physical changes are reversible in most parts.
• Changes in state and form are salient characteristics of physical changes.
• When new products are formed from the reactants, it is an indicator of a chemical change.