What is real and apparent Expansivity?
The real (or absolute) expansivity of a liquid is the fraction of its volume by which it expands per kelvin rise in temperature. The apparent expansivity of a liquid is the fraction of its volume by which the liquid appears to expand per kelvin rise in temperature when heated in an expansible vessel.
What is the difference between real and apparent expansion?
Apparent Expansion means the thermal expansion of a liquid as measured in a graduated container without allowance for the expansion of the container. The real expansion of the liquid = Apparent expansion of the liquid + Volume expansion of the container.
What is the formula of apparent Expansivity?
1. Linear expansivity is the fractional increase in length of a specimen of a solid, per unit rise in temperature. If a specimen increases in length from l1 to l2 when its temperature is raised θ°, then the expansivity (α) is given by: l2 = l1(1 + αθ).
What is apparent increase in volume?
The apparent increase in the volume of liquid per unit original volume per degree rise in Temperature is called coefficient of apparent expansion.
What do you mean by apparent expansion of the liquid?
A liquid is heated in a container. Heat flows through the container to the liquid. This means that the container expands first, due to which the level of the liquid falls. This observed expansion of the liquid is known as the apparent expansion of the liquid and is less than its actual expansion.
What is the relationship between real and apparent expansion of liquid?
The real expansion of a liquid is equal to the sum of its apparent expansion and the volume expansion of the vessel containing the liquid.
Why are there two types of expansion in liquids?
It is because of volume expansion of the solid container. Therefore liquids have two types of expansion coefficients. One is the apparent expansion coefficient and the other one is the real expansion coefficient.
What is anomalous expansion of water?
• Anomalous expansion of water is defined as the expansion of water when it is cooled from four degree celsius to zero degree celsius. • Volume and density of water changes in different ways when heated from zero degree celsius to ten degree celsius.
Which liquid has an abnormal expansion?
Water
Why is anomalous expansion of water important?
The anomalous expansion of water helps preserve aquatic life during very cold weather. When temperature falls, the top layer of water in a pond contracts, becomes denser and sinks to the bottom. A circulation is thus set up until the entire water in the pond reaches its maximum density at 4°C.
What are water anomalous properties?
Notable amongst the anomalies of water are the opposite properties of hot and cold water, with the anomalous behavior more accentuated at low temperatures. Hot water freezes faster than cold water and ice melts when compressed except at high pressures when liquid water freezes when compressed.
What is an example of anomalous?
The definition of anomalous is something abnormal or deviating from the usual method. A person with 50 piercings and tattoos is an example of someone who is anomalous. Deviating from the normal or common order, form, or rule.
What is anomalous Behaviour of water explain with example?
Answer. water has a unique property of anomalous expansion. When water is cooled from room temperature it first contracts in volume and becomes increasingly dense as do other liquids, but at 4° C water reaches its maximum density. On further cooling it starts expanding and become less dense.
What are the 10 properties of water?
Unique properties of water
- Water is polar.
- Water is an excellent solvent.
- Water has high heat capacity.
- Water has high heat of vaporization.
- Water has cohesive and adhesive properties.
- Water is less dense as a solid than as a liquid.
What are the 12 properties of water?
The main properties of water are its polarity, cohesion, adhesion, surface tension, high specific heat, and evaporative cooling. A water molecule is slightly charged on both ends.
What are the 5 chemical properties of water?
Because water seems so ubiquitous, many people are unaware of the unusual and unique properties of water, including:
- Boiling Point and Freezing Point.
- Surface Tension, Heat of Vaporization, and Vapor Pressure.
- Viscosity and Cohesion.
- Solid State.
- Liquid State.
- Gas State.
How does hydrogen bonding affect the boiling points of liquids?
Molecules with hydrogen bonds will always have higher boiling points than similarly sized molecules which don’t have an an -O-H or an -N-H group. The hydrogen bonding makes the molecules “stickier,” such that more heat (energy) is required to separate them.
What is the weakest type of IMFA?
Relative strength of intermolecular forces of attraction
| Intermolecular force | Occurs between … | Relative strength |
|---|---|---|
| London dispersion attraction | Temporary or induced dipoles | Weakest |