Acetone has the weakest intermolecular forces because it had evaporated the fastest out of all three products. Water has the strongest intermolecular forces and evaporated the slowest out of all. This means that the Isopropyl Alcohol intermolecular forces are in between Water and Acetone; however, the Alcohol’s intermolecular force is closer to the Acetones intermolecular force because it evaporated after it by about a minute, and the water took a very long time to evaporate.Acetone evaporates the quickest because its molecules does not participate in Hydrogen bonding so its intermolecular forces are weak. Water’s molecules are attracted to one another by Hydrogen which means it evaporates the slowest.
Isopropyl alcohol also interacts with Hydrogen bonding, but not as successful as water because it has a non-polar region, which means it evaporates not so quick and not so slow.The temperature decreased for every soaked paper towels during the experiment because evaporation is a phase change that absorbs energy. During the evaporation phase, fast moving, highly energetic molecules have enough energy to solve the attraction that an individual molecules can’t overcome or for it to enter the gas phase and for it to evaporate in certain times. When the molecules leave the liquid evaporation phase, the average energy left from the remaining liquid molecules are lowered and this causes the temperature to decrease. Since the liquid is now at a low temperature, it stills absorbs energy from its surrounding to keep the evaporation going.
These first three diagram shows the equal energy numbers of moles of water, acetone, and Isopropyl Alcohol. The first diagram represents Water, the second diagram represents Isopropyl Alcohol, and the third diagram represents Acetone. The three diagrams show the process of evaporation absorbing energy. As you can see, these diagrams show that Acetone absorbs the least energy, Water absorbs the most energy, and Isopropyl Alcohol is somewhere in between.These 2 diagrams are showing an example of what happens how energy is being absorbed to form into the liquid state of matter, which requires for it to melt. On the right, the diagram shows how the energy of the water is being released to form ice.Evaporation is a cooling process because during the liquid state, molecules are closer together than any other gas state.
To separate the molecules of a liquid, energy is required as they become further apart during the transition to the gas phase.Sweating is a form of “evaporative cooling”. People sweat because of temperature regulation; this means that when we are hot, we sweat, it helps maintain the body temperature by cooling it down, and it does that by evaporating the moisture from the sweat which cools us down. Also, as our sweat evaporates it absorbs energy from our skin, which is why it cools us down. Condensation is a warming process because the energy is being released as molecules in the gas phase when it is transitioning and coming closer in the liquid phase Since the molecules are attracted by each other, they are at a lower energy when the are closer together (in the liquid phase) than how when they were further apart (in the gas phase). The transition from high energy to low energy releases heat to the surroundings.