Table of Contents
- 1 Why mercury is heated by conduction?
- 2 How conductive is liquid mercury?
- 3 Which is the only liquid in which conduction is possible?
- 4 Why does conduction happen in liquids and gases?
- 5 Which is best conductor of heat water or mercury?
- 6 Why is mercury not a conductor of electricity?
- 7 What happens when a current flows through a mercury wire?
Why mercury is heated by conduction?
Mercury is the only metal which is available in the liquid state. To heat the mercury, the conduction method is used and not convection like most of the liquids. Mercury offers strong resistance to the removal of the electrons making the bonds weak.
How conductive is liquid mercury?
Mercury is a poor conductor of heat, but a fair conductor of electricity. As a result, mercury forms weak bonds and is a liquid at room temperature. Mercury dissolves to form amalgams with gold, zinc, and many other metals.
Can conduction occur in liquids?
Conduction occurs more readily in solids and liquids, where the particles are closer to together, than in gases, where particles are further apart. The rate of energy transfer by conduction is higher when there is a large temperature difference between the substances that are in contact.
Why mercury is a good conductor of heat but not water?
We know that most metals are good conductors of heat as solid at room temperature. But mercury is the only good conductor of heat in a liquid state due to its high coefficient of expansion. One more property of mercury that is its high boiling point makes it suitable for measuring high temperatures.
Which is the only liquid in which conduction is possible?
Mercury is the only liquid at room temperature in which conduction is possible.
Why does conduction happen in liquids and gases?
Conduction in Gases and Liquids Because the molecules of fluids have a greater freedom of motion than in solids, there is less of a chance that vibrating molecules will collide with another and transfer energy throughout the fluid.
Why is conduction not possible in liquid and gas?
Conduction is not possible in liquids and gases because liquids and gases move freely. Conduction is only possible in solids, because it is done by not actual movement of the particles of heat energy. But, Liquids and gases move, they come in either Convection or radiation.
Is mercury a best conductor of heat?
Correct Option: B Since mercury is 13+ times as dense as water, a given volume of mercury would carry about 4.4 times as much heat, so mercury is best conductor of heat among the given options. It is the only metal that is liquid at standard conditions for temperature and pressure.
Which is best conductor of heat water or mercury?
The correct answer is Mercury. The best conductor of heat among liquids is Mercury.
Why is mercury not a conductor of electricity?
The very fact that mercury is a liquid and not a gas shows that there is some bonding in mercury, even if it is weaker than the bonding in most metals. So, it is conductive the same way other metals are, just less conductive. You can look up the conductivity of mercury, and you will find it to be lower than most metals.
What is liquid mercury used for in semiconductor materials?
It is sometimes used to make good ohmic contacts on semiconductor samples. It is much less volatile. No, liquid mercury is not an electrolyte. It is still a conductor of a first kind, a metal, so all the conduction is done by the free (delocalized) electrons.
How does Mercury react to temperature?
As with most liquid substances, mercury reacts to temperature increases by expanding by a predictable amount; this and other properties made mercury useful in thermometers until they were phased out in favor of less toxic alternatives.
What happens when a current flows through a mercury wire?
There are no chemical effects associated with a current flow through mercury and no mass transport. In the electrolytes, being conductors of a second kind, the conduction is via the migration of both positive and negative ions which are rarely free electrons (too reactive in the medium!).