Question

Identify each of the following as a physical or chemical change: $(3,2)$

a. Aspirin tablets are broken in half.

b. Carrots are grated for use in a salad.

c. Mall undergoes fermentation to make beer.

d. A copper pipe reacts with air and turns green.

Short answer

(part a) Breaking an aspirin tablet is a physical change because no new compounds are formed.

(part b) Carrot grating is a physical transformation. There are no new compounds formed.

(part c) Malt ferments and becomes a new substance. As a result, a chemical change occurs.

(part d) The reaction of a copper wire with air As a result, it is classified as a chemical property.

Step-by-step solution

Given information (Part a)

Aspirin tablets are broken in half.

Step 2:Explanation (Part a)

Aspirin tablet breaking is a physical change because no new compounds are formed during this process.

Step 3:Given information (Part b)

Carrots are grated for use in a salad.

Explanation (Part b)

Carrot grating is a physical change. Only the size of the carrot changes during this process, and no new substance is formed.

Given information (Part c)

Mall undergoes fermentation to make beer.

Explanation (Part c)

Malt ferments and transforms into a new substance. We won't be able to get the malt again. As a result, it is a chemical change.

Given information (Part d)

A copper pipe reacts with air and turns green.

Explanation (Part d)

When a copper wire reacts with air, it produces a green substance on its surface. As a result, it is a chemical property.