Are solvent and solution the same?

A solution is a homogeneous mixture consisting of a solute dissolved into a solvent . The solute is the substance that is being dissolved, while the solvent is the dissolving medium. Solutions can be formed with many different types and forms of solutes and solvents.

What does heat of vaporization depend on?

The enthalpy of vaporization can strongly depend on temperature. In fact, DvapH approaches zero as the liquid-vapor co-existence line approaches the critical point, as there is no distinction between liquid and vapor at temperatures and pressures above the critical point!

Why is the heat of vaporization always higher than the heat of fusion for the same substance?

The reason is that for melting, the molecules just need enough energy to “slide” around each other, while for vaporization, they need enough energy to completely escape the well. This means that the enthalpy of vaporization is always going to be higher than the enthalpy of fusion.

Why is the Vapour pressure of a solution less than that of the pure solvent?

More correctly, the vapor pressure of solution containing a non-volatile (zero vapor pressure) solute is lower than that of the pure solvent. Because the solution is more stable, fewer molecules are leaving to the gas phase. This lower evaporation rate leads to a lower vapor pressure.

Which statement best explains the difference between solutes and solvents?

A solute is a substance that can be dissolved by a solvent to create a solution. A solute can come in many forms. It can be gas, liquid, or solid. The solvent, or substance that dissolves the solute, breaks the solute apart and distributes the solute molecules equally.

What is the difference between specific heat and heat of vaporization?

Heat of vaporization is the energy needed for one gram of a liquid to vaporize (boil) without a change in pressure. , former M.D. Specific heat is the amount of heat energy it takes to raise 1 gram by 1 degree Celsius (or Kelvin). For water it is 1 j/g.

Is latent heat of vaporization same as heat of vaporization?

The enthalpy of vaporization (symbol ∆Hvap), also known as the (latent) heat of vaporization or heat of evaporation, is the amount of energy (enthalpy) that must be added to a liquid substance to transform a quantity of that substance into a gas.

Why is heat of vaporization for water so much larger than the heat of fusion of ice?

This is because when the molecules change into gaseous state they leave the system and they don’t have any forces of attraction with other molecules. Therefore, the latent heat of vaporization of water is more than latent heat of fusion of ice.

Why does the latent heat of vaporization require so much heat energy?

The energy required to completely separate the molecules, moving from liquid to gas, is much greater that if you were just to reduce their separation, solid to liquid. Hence the reason why the latent heat of vaporization is greater that the latent heat of fusion.

Why vapour pressure of solvent is higher than the vapour pressure of solution?

In pure solvent the surface is oC Cupied by solvent molecules only. Number of molecules evpoarating will be more, hence vapour pressure is more.

Why does lower vapor pressure mean lower freezing point?

There are fewer solvent molecules at the surface capable of vaporizing so the vapor pressure drops. Thus, the temperature of the boiling point must be increased. Another consequence of lowered vapor pressure is a decrease in freezing point. A picture can be used to explain this too.

How does solute affect the rate of vaporization and condensation?

The presence of solute decreases the surface area available to solvent molecules and thereby reduces the rate of solvent vaporization. Since the rate of condensation is unaffected by the presence of solute, the net result is that the vaporization-condensation equilibrium is achieved with fewer solvent molecules in the vapor phase

How much energy does vaporization of solvents consume?

Since the heat of vaporization of solvents is around 200 BTU/lb (one-fifth that of water), energy consumption is much less.

What is the difference between vaporization and enthalpy of vaporization?

Vaporization (or Evaporation) the transition of molecules from a liquid to a gaseous state; the molecules on a surface are usually the first to undergo a phase change. Enthalpy: the amount of heat consumed or released in a system at constant pressure.

What is the specific heat of vaporization of water?

Heat of Vaporization of Water Water has high specific heat. This measurement describes the amount of energy it takes to raise the temperature of water 1 degree Celsius. As such, water also has a high heat of vaporization.