Temperature and Temperature Scales

Sneha and her friend were doing an experiment in the chemistry lab.

They were separating a liquid mixture by the process of distillation.

Her teacher asked her to turn off the flame when the temperature reaches .

In the given setup, a thermometer is fixed through which they can observe the temperature rise in .

But her friend's thermometer is different and values are given in .

She doesn't understand where lie on scale.

Let's help her to understand the concept of temperature and different types of temperature scales.

Temperature is a measure of the degree of hotness or coldness of a body.

If you touch a hot cup of tea, you feel warm, which means the temperature of the coffee is more than your hand.

But on the other hand, if you touch ice cream you feel cold, which means the temperature of ice cream is lower than your hands.

It can say that temperature tells that how much body is hot or cold.

Suppose you have 1 kg of water in a container and 3 kg of water in another container.

Now heat both the container and measure the temperature of both container.

You may notice that water boils at either it is taken 1 kg or 3 kg.

So, it can be concluded that temperature doesn't depend on the mass of the body.

The temperature of a body can be measured with the help of thermometer.

SI unit of temperature is Kelvin, which is denoted by .

Let's understand different temperature scales which are used.

The first one is the Celsius scale and can be denoted by .

On scale, the melting point of ice is while the boiling point of water is .

The second one is the Kelvin scale and can be denoted by .

On scale, the melting point of ice is while the boiling point of water is .

Conversion of temperature from to is given as-

The third one is the Fahrenheit scale and can be denoted by .

On scale, the melting point of ice is while the boiling point of water is .

Conversion of temperature from to is given as-

Revision

Temperature is a measure of the degree of hotness or coldness of a body.

Temperature is independent of the mass of the body and its SI unit is Kelvin(K).

Relation between , and is given as-

The End