Q. 3.77 - An Introduction to General, Organic, and Biological Chemistry

Question

Identify each of the following as a physical or chemical property: (3.2)

a. Gold is shiny.

b. Gold melts at $1064°\mathrm{C}$

c. Gold is a good conductor of electricity,

d. When gold reacts with sulfur, a black sulfide compound forms.

Step-by-Step Solution

Answer

(part a) Its gleaming appearance, which is a physical property of gold.

(part b) As a result, gold's melting point is a physical property.

(part c) The ability of gold to conduct electricity is a physical property.

(part d) A chemical change occurs as a result of the reaction between gold and yellow sulphur, resulting in the formation of a new compound.

Step 1: Given information ( Part a)

The given sentences are: a.

The physical properties of gold.

Step 2: Explanation (Part a)

Gold is shiny:

Gold's physical appearance is its gleaming aspect, which is classified as a physical property of gold.

Step 3: Given information (Part b)

The given sentences are: b.

The melting of gold change solid to liquid

Step 4: Explanation (Part b)

 Gold melts at $1064°\mathrm{C}$

When gold is melted, its physical state changes from solid to liquid. As a result, the melting point of gold is a physical property.

Step 5: Given information (Part c)

The following sentences are: c.

Gold is the good conductors of electricity.

Step 6: Explanation (Part c)

Because gold is a metal, there are free electrons that can carry electricity and no new substance is formed in the process, so gold's ability to conduct electricity is a physical property.

Step 7: Given information (Part d)

The following sentences are: d.

Chemical property of gold.

Step 8: Explanation (Part d)

 When gold reacts with yellow sulphur, it produces a black compound:

The reaction between gold and yellow sulphur results in a chemical change and the formation of a new compound. As a result, this is the chemical property of gold.