What is the thermometric substance of gas thermometer?

A liquid in glass thermometer uses mercury or alcohol as its thermometric substance. Substances that show a change in temperature can be used as a thermometric material.

What are the two liquids used in liquid gas thermometer?

A working liquid is generally either mercury or alcohol. An inert gas, mainly argon or nitrogen which is filled inside the thermometer above mercury to trim down its volatilization.

What are the thermometric liquids used in thermometer?

Mercury is the only one in liquid state at room temperature. It’s used in thermometers because it has high coefficient of expansion. Hence, the slightest change in temperature is notable when it’s used in a thermometer.

What substance is a thermometer?

In a mercury thermometer, a glass tube is filled with mercury and a standard temperature scale is marked on the tube. With changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale. Mercury thermometers can be used to determine body, liquid, and vapor temperature.

Why is helium used in gas thermometer?

Helium has low boiling point and has nearly ideal behaviour at low temperature. Thus it is used for low-temperature gas thermometry.

What is the blue liquid in a thermometer?

Mercury is found in a number of household products, including fever thermometers. A standard mercury fever thermometer contains about ½ gram of mercury.

What are gas thermometer used for?

a device for measuring temperature by observing the change in either pressure or volume of an enclosed gas.

What is the use of gas thermometer?

A gas thermometer is a thermometer that measures temperature by the variation in volume or pressure of a gas.

What is the thermometric substance of a constant volume gas thermometer?

A constant volume gas thermometer is composed of a bulb filled with a fixed amount of a dilute gas that is attached to a mercury manometer. A manometer is a device used to measure pressure.

What is mercury gas?

Elemental (Metallic) Mercury At room temperature, exposed elemental mercury can evaporate to become an invisible, odorless toxic vapor. If heated, it is a colorless, odorless gas.

Why is alcohol used in thermometer?

Ethanol has low freezing point. Hence, it is used in thermometers.