Question

Why carbontetra chloride exist in liquid form at room temperature?

Answer 1

Because Carbon Tetrachloride has a melting point of 250K and room temperature is 300K. The boiling point of Carbon Tetrachloride is 349.85K.

Answer 2

It is a liquid because at room temperature the molecular structure of the substance wants to expand. When the substance expands it goes from being a solid to a liquid. This expansion takes place when the room is at the commonly know "room temperature"

Answer 3

Because chlorine is in Period 3 and has a lot of electrons. That means the outer layers of the CCl4 molecule consist of a large, fairly polarizable cloud of electrons, which in turn means the London intermolecular forces between CCl4 molecules will be pretty strong. Those pretty strong intermolecular forces will keep the CCl4 molecules sticking to each other until the temperature is fairly high.

This is in contrast to a molecule like CH4, which has very similar shape and bonding. But since the H atom has very few electrons, relative to the Cl atom, the CH4 molecule is NOT very polarizable, the London forces are NOT as strong, and therefore CH4 will boil at a much lower temperature.

Other, unsymmetric molecules, like SCN or chloroform, stick together because of dipole-dipole attractions. Still other molecules, like water, stick together because of hydrogen-bonding interactions. Neither of these operate for CCl4, so you might expect it to be low-boiling, like other symmetric molecules. It's not, because of the large number of electrons in it, as I said above.

Answer 4

thank you arshoro