Thermal energy motion produced

Solubility Parameter. Increased attractive forces between molecules, as measured by a larger solubility parameter, requires more thermal energy to produce molecular motion. This results in an increase in the Tg with increasing cp. Eisenberg (1993) provides an equation that relates the molar cohesive energy density,o2p, to the glass transition by... 

Using Heat (Thermal Energy) to Produce Motion... 

Particle tracking also produced trajectory paths of the Pt/Au nanorods based on displacement data collected for the head and tail of each nanorod. The head is defined as the direction in which the nanorod moves. The trajectory paths clearly distinguish the motion of a Pt/Au nanorod from that of a Brownian colloidal cylinder moving under the influence of thermal energy (Fig. 3.1). In addition, the trajectory path helps visualize some of the defined physical parameters. 

Whereas monatomic molecules can only possess translational thermal energy, two additional kinds of motions become possible in polyatomic molecules. A linear molecule has an axis that defines two perpendicular directions in which rotations can occur each represents an additional degree of freedom, so the two together contribute a total of 1/2 R to the heat capacity. For a non-linear molecule, rotations are possible along all three directions of space, so these molecules have a rotational heat capacity of 3/2 R. Finally, the individual atoms within a molecule can move relative to each other, producing a vibrational motion. A molecule consisting of N atoms can vibrate in 3N-6 different ways or modes1. For mechanical reasons that we cannot go into here, each vibrational mode contributes R (rather than 1/2 R) to the total heat capacity. 

Thermal energy is the sum of the energy produced by the random motions of the components. 

The temperature of a substance indicates the vigor of the random motions of the components of that substance. The thermal energy of an object is the energy content of the object as produced by its random motions. 

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