What are the characteristics of a good thermometric substance?
A good thermometric property of matter should vary:
- Constantly with temperature.
- Uniquely over the range of temperature to be calculated.
- Its variation should be computable.
What is a thermometric liquid?
[‚thər·mə¦me·trik ′flü·əd] (thermodynamics) A fluid that has properties, such as a large and uniform thermal expansion coefficient, good thermal conductivity, and chemical stability, that make it suitable for use in a thermometer.
What are the thermometric properties in making a thermometer liquid?
A property which changes with temperature is called a thermometric property. These can include volume, pressure, electrical resistance, emf and colour. With one of these properties, a thermometer can be made.
Why is water not a good thermometric liquid?
higher freezing point and low boiling point than other thermometric liquids. B. lower freezing points and higher boiling point than other thermometric liquids.
What are thermometric liquids examples?
Thermometer liquids are mercury and alcohol.
What are the 4 types of thermometer?
There are different types, but not all thermometers are right for your child.
- Digital thermometers.
- Ear (or tympanic) thermometers.
- Infared thermometers.
- Strip-type thermometers.
- Mercury thermometers.
What are the properties of thermometer?
Thermometric property of constant volume gas thermometer….Thermometry and Calorimetry:
| Heat Energy | Temperature and its Measurement |
|---|---|
| Thermometric Property | Thermometers |
| Thermal Expansion | Thermal Equilibrium |
| Triple Point of Water | Specific Heat Capacity |
| Thermal Capacity | Water Equivalent |
What are the examples of thermometric properties?
Examples of thermometric properties:
- Length of a column of liquid, e.g. mercury and alcohol thermometers.
- Electrical resistance (see chapter 23)
- Colour (colour ‘strips’ are sometimes used by nurses and placed against a person’s forehead)
- Emf of a thermocouple – see next page (emf is a fancy word word for ‘voltage’)
Why is mercury preferred to water as a thermometric liquid?
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.
Does water wet glass?
Forces of attraction between a liquid and a solid surface are called adhesive forces. Water wets glass and spreads out on it because the adhesive forces between the liquid and the glass are stronger than the cohesive forces within the water.
What are thermometric liquids two examples?
Which is the most commonly used thermometric liquid?
mercury
Liquid in thermometers are suitable for narrow change of measurements. The most commonly used liquid is mercury.
What are the characteristics of a thermometer liquid?
Give at least five characteristic of a liquid used as thermometric liquid used in thermometers. (vi) should have high boiling point and low freezing point. Two absolute scales A and B have triple points of water defined to be 200 A and 350 B. What is the relation betweenTA and TB?
Which is a good thermometric property of matter?
A good thermometric property of matter should vary: uniquely over the the range of temperature to be measured its variation should be measurable. Most solids or liquids or gases expand and contract their volume when the temperature around them changes. Mercury is the only elemental metal that is liquid at ordinary temperatures.
Is the volume of a liquid a thermometric property?
Volume As Thermometric Property Most solids or liquids or gases expand and contract their volume when the temperature around them changes. Mercury is the only elemental metal that is liquid at ordinary temperatures.
Why is mercury used as a thermometric property?
Volume As Thermometric Property. Mercury does not wet glass or cling to it, and this property, coupled with its uniform volume expansion throughout its liquid range, makes it useful in liquid-in-glass thermometers. Gases such as nitrogen or simply air are also suitable substances for use in volumetric gas thermometers.