Question

Describe an alcohol thermometer with the aid of a neat labeled sketch.

Answer 1

Answer:

A thermometer works on the principle that solids and liquids expand on heating. As the temperature rises, mercury expands causing it to move upwards and depict the temperature.

The liquid is often mercury, but alcohol thermometers use a colored alcohol. Medically, a maximum thermometer is often used, which indicates the maximum temperature reached even after it is removed from the body. ... As the temperature of the bulb rises, the liquid expands up the tube through the constriction.

for the diagram please refer to the attachment

Hope it will help you

Explanation:

Answer 2

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The liquid in glass thermometer, is the most commonly used device to measure temperature and it is inexpensive to make and easy to use.

The liquid in glass thermometer has a glass bulb attached to a sealed glass tube (also called the stem or capillary tube).

A very thin opening, called a bore, exists from the bulb and extends down the centre of the tube.

The bulb is typically filled with either mercury or red-coloured alcohol and is free to expand and rise up into the tube when the temperature increases, and to contract and move down the tube when the temperature decreases.

In the Liquid In Glass Thermometers (LIG) the thermally sensitive element is a liquid contained in a graduated glass envelope.

The principle used to measure temperature is that of the apparent thermal expansion of the liquid.

A typical liquid-in-glass thermometer is shown in the figure below.