Question: Which Of The Following Has The Highest Boiling Point?

What defines boiling point?

Boiling point, temperature at which the pressure exerted by the surroundings upon a liquid is equaled by the pressure exerted by the vapour of the liquid; under this condition, addition of heat results in the transformation of the liquid into its vapour without raising the temperature.


Which compound has the lowest boiling point?

EtheneEthene has lowest boiling point. The boiling points of ethane, ethene and ethyne are 184.5 K, 171 K and 198 K respectively.

Which hydride has lowest boiling point?

The higher boiling point of NH3 is due to excessive hydrogen bonding, so PH3 have lowest boiling point among hydrides of group number 15, i.e. nitrogen family.

Which of the following shows the highest boiling point?

In hydrides of group 16 , H2O has highest boiling point . It is due to extensive H–bonding which exist even in liquid state.

How does branching affect boiling point?

With increase in the branching, the surface area of the molecule decreases and vander waals forces of attraction decreases which can be overcome at a relatively lower temperature. Hence, the boiling point of an alkane chain decreased with an increase in branching.

What’s the boiling point of milk?

100.5°C.Milk is a compound liquid which contains fat in emulsion form, protein in colloidal state and lactose as true solution and the boiling point of milk is 100.5°C. When milk is heated, the fat which is lighter than water is collected on the surface along with certain protein in the form of a layer called cream.

Which compound has highest boiling point?

EthanolEthanol has the highest boiling point (C2H5OH) because of higher description or vander waal forces and dipole-dipole interactions. The vander waals dispersion forces increase as the length of the hydrocarbon chain increases.

Which alkane has highest boiling point?

Answers: Nonane will have a higher boiling point than octane, because it has a longer carbon chain than octane. Octane will have a higher boiling point than 2,2,3,3‑tetramethylbutane, because it branches less than 2,2,3,3‑tetramethylbutane, and therefore has a larger “surface area” and more van der Waals forces.

Does boiling point increase across a period?

Their melting or boiling points will be lower than those of the first four members of the period which have giant structures. … The molecules are bigger than phosphorus molecules, and so the van der Waals attractions will be stronger, leading to a higher melting and boiling point.

How do you calculate boiling point?

The basic method to estimate boiling point is Group Contibution (Additivity) method. This method determine each Functional group’s (FG’s) factor and make summation. For example, normal alkane compounds, the boiling point will increase 30.494K if CH2 group increase one.

Which has the highest boiling point?

TungstenThe chemical element with the lowest boiling point is Helium and the element with the highest boiling point is Tungsten. The unity used for the melting point is Celsius (C).

What is the trend in boiling point?

Different groups exhibit different trends in boiling and melting points. For Groups 1 and 2, the boiling and melting points decrease as you move down the group. For the transition metals, boiling and melting points mostly increase as you move down the group, but they decrease for the zinc family.

Why is boiling point important?

Besides indicating the physical state (liquid or gas) of a substance at ambient or room temperature, boiling point serves as an indicator of volatility even for laymen, with higher boiling points indicating lower volatility. … Knowing the boiling point of a chemical is also very important for its storage & transport.

What is an example of boiling point?

The boiling point of a substance is the temperature at which the vapor pressure of a liquid equals the pressure surrounding the liquid and the liquid changes into a vapor. … For example, water boils at 100 °C (212 °F) at sea level, but at 93.4 °C (200.1 °F) at 1,905 metres (6,250 ft) altitude.