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Chapter 3: Q. 3.77 (page 92)

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

a. Gold is shiny.

b. Gold melts at 1064掳C

c. Gold is a good conductor of electricity,

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

Short Answer

Expert verified

(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 by step solution

01

Given information ( Part a)

The given sentences are: a.

The physical properties of gold.

02

Explanation (Part a)

Gold is shiny:

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

03

Given information (Part b)

The given sentences are: b.

The melting of gold change solid to liquid

04

Explanation (Part b)

Gold melts at 1064掳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.

05

Given information (Part c)

The following sentences are: c.

Gold is the good conductors of electricity.

06

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.

07

Given information (Part d)

The following sentences are: d.

Chemical property of gold.

08

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.

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