What is the vapor pressure of isopropyl alcohol?
Table of Contents
What is the vapor pressure of isopropyl alcohol?
33 mmHg
Molecular weight=60.11; specific gravity (H2O:1)=0.79; boiling point=82.3°C; freezing/melting point=−79.5°C; vapor pressure=33 mmHg @ 20°C; 75 mmHg @ 34°C; flash point=12°C; autoignition temperature=399°C.
What is the heat of vaporization of isopropyl alcohol?
39.85
Enthalpy of vaporization
| ΔvapH (kJ/mol) | 39.85 |
|---|---|
| Temperature (K) | 355.4 |
| Method | N/A |
| Reference | Majer and Svoboda, 1985 |
What is the vapor density of isopropyl alcohol?
0.7854 g/mL
| Physical Properties | |
|---|---|
| Vapor pressure | 32.4 Torr at 20°C |
| Freezing point | -88.0°C |
| Refractive index | 1.3772 at 20°C |
| Density | 0.7854 g/mL (6.554 lb/gal) at 20°C |
Why does isopropyl alcohol evaporate fast?
The molecules of isopropyl alcohol don’t stick together as strongly at room temperature as water molecules do, which means the alcohol evaporates more quickly than water does. More molecules fly off, and they carry more heat energy with them. That’s why there is a stronger cooling effect.
Does alcohol have a high vapor pressure?
It also has the highest vapor pressure. Due to its smaller size, ethanol exhibits weaker dispersion forces than diethyl ether.
How do you make isopropyl alcohol evaporate faster?
Evaporation can happen naturally at room temperature, or you can speed up the process by introducing heat. Heat evaporates the alcohol faster, leaving concentrated medicine behind. Additionally, air movement, such as with a fan, can help to evaporate the alcohol faster as well.
Does isopropyl alcohol evaporate completely?
Pure isopropyl alcohol would normally evaporate completely at room temperature in our standard atmosphere. If there is a residue, it is due to dissolved or suspended impurities, including anything it may have dissolved from the surface that it is evaporating on.
Does volume affect vapor pressure?
Volume does not affect vapor pressure ! The liquid in a container is in equilibrium with the vapor. When the volume is changed, for example – decreased, some of the vapor in the container turns into it’s liquid state. Furthermore, if the volume is increased, some of the liquid will change into it’s vapor state.
Does isopropyl alcohol fully evaporate?
What is the highest vapor pressure?
At the normal boiling point of a liquid, the vapor pressure is equal to the standard atmospheric pressure defined as 1 atmosphere, 760 Torr, 101.325 kPa, or 14.69595 psi. For example, at any given temperature, methyl chloride has the highest vapor pressure of any of the liquids in the chart.
Which substance has a higher vapor pressure?
Thus at room temperature, the substance with the lowest boiling point will have the highest vapor pressure (easiest to get into the gas phase). The substance with the highest boiling point will have the lowest vapor pressure. Vapor pressure is a liquid property related to evaporation.
What is the vapor pressure of ethyl alcohol at 45 C?
The vapor pressure of ethanol at 45 degrees Celsius is 0.227 atm.
What is the vapor pressure of ethanol at 19 C?
A 0.800 g sample of ethanol is placed in a 2.20 L container at 19 ∘C.
What is the evaporation rate of alcohol?
0.150 picogram/minute
From the resonant frequency data, the evaporation rate of ethanol can be calculated to be 0.150 picogram/minute.
Does alcohol evaporate in air?
Since alcohol is more volatile than water, it will, by definition, tend to evaporate faster. However, the relative evaporation rates depend on what’s going on above the surface. In a moist climate, alcohol evaporates considerably more quickly than water.
