Researchers from the UK and Russia have found a connection between the movement of molecules and how a liquid is heated. They were even able to record the fact that molecules, at certain temperatures, repeat their trajectory over and over again.
Scientists have discovered a link between the microscopic movement of particles in a liquid and its ability to absorb heat. They proved that when a liquid heats up, the molecules in it begin to move more intensively. As the temperature rises, particles begin to move more and more often and cover ever greater distances. Together, these movements create patterns – researchers also call them “dances.”
In the study, published in the journal Physical Review Letters, scientists used computer simulations to document the behavior of fluids. They found that the collective excitations seen in liquids can become so intense over time that they begin to interact with each other, changing the way the liquid absorbs heat.
A group of researchers, which included scientists from the Queen Mary University of London, Moscow State Technical University. Bauman and the Institute for High-Pressure Physics of the Russian Academy of Sciences in Russia checked the results obtained on various types of liquids and came to the conclusion that this relationship is universal for all of them.
The discovery of a new relationship allows us to bridge the gap between the microscopic behavior of liquids and their key macroscopic properties – heat capacity. It also suggests that there is an optimum temperature region for cooling, and that region can be manipulated by tuning molecular dances.
“We hope that the identification of this connection between collective excitation and heat absorption can lead to the creation of the theory of liquids, which is one of the oldest problems in the field of condensed matter physics,” the researchers noted.
Earlier, researchers at Lancaster University in the UK showed how atoms can control the shape and direction of light. This discovery will make further experiments several times cheaper.