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Chapter 1: Problem 8

State whether the following properties are physical or chemical. (a) A piece of sliced apple turns brown. (b) A slab of marble feels cool to the touch. (c) A sapphire is blue. (d) A clay pot fired in a kiln becomes hard and covered by a glaze.

Short Answer

Expert verified
(a) Chemical property, (b) Physical property, (c) Physical property, (d) Chemical property.

Step by step solution

01

Define Physical and Chemical Properties

Physical properties are characteristics that can be observed or measured without changing the identity of the substance. Examples include color, odor, texture, state of matter, boiling and melting point, and hardness. Chemical properties describe a substance's ability to undergo a chemical change, turning it into a different substance. Examples are reactivity, flammability, and the ability to rust or oxidize.
02

Identify Property (a)

When an apple is cut or bruised, it turns brown due to a chemical reaction between enzymes in the apple and oxygen in the air. This change affects the composition of the apple, thus it's a chemical property.
03

Identify Property (b)

When a slab of marble feels cool to the touch, that is a physical property. This sensation is related to the marble's ability to conduct heat, which does not involve a change in the substance's composition.
04

Identify Property (c)

The color of a sapphire is a physical property. The color is observable without interacting with the substance and changing its composition.
05

Identify Property (d)

When a clay pot is fired in a kiln and becomes hard and covered by a glaze, the clay undergoes a chemical change. This process alters the chemical structure of the clay, making it a chemical property.

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Most popular questions from this chapter

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