Question

1. Without changing the chemical composition of a material, how can you change the properties of a material?

2. You have developed a new, recyclable material you think is suitable for recyclable tires. What properties/characteristics will ultimately define whether Goodyear Tires will implement your new material?

Answer 1

Ans 1 :

There are basically two types of properties : physical and chemical

The physical properties such as colour , density , boiling point etc can be measured without having to change the chemical composition of the compound whereas the chemical properties can be measured only by reacting the compounds and hence changing their chemical composition.

These properties are fixed for a pure compound at given temperature and pressure conditions. As we change the temperature and pressure of the system , the properties also change (without changing the chemical composition).

For example : water boils at lower temperature (less than 100^oC) at high pressures.