Sublimation of Dyes

A sublimation heat engine

Heat engines are based on the physical realization of a thermodynamic cycle, most famously the liquid-vapour Rankine cycle used for steam engines. Here we present a sublimation heat engine, which can convert temperature differences into mechanical work via the Leidenfrost effect. Through controlled experiments, quantified by a hydrodynamic model, we show that levitating dry-ice blocks rotate on...

Graphite Sublimation Tests

Mawlawi’s Point of View About The Process of Psychological Sublimation

One of Mawlawi’s psychological approaches is the process of Sublimation or Catharsis which is used to change and turn the inner desires of mankind to suitable desires that are acceptable and favourable to society and social constitutions. Since the nature of human-being is the best cradle for conflicts or oppositions of The Upper and Lower Desires (i.e. the former known as spiritual desires and...

Sublimation inside an elastoplastic material.

Thermodynamic and kinetic approaches for sublimation inside elastoplastic material under tensile stress are developed for large strains. Various conceptual problems related to irreversible plastic deformation are addressed for a spherical bubble. They include definitions of the thermodynamic driving forces and activation energies, nontraditional concepts of a critical nucleus, path dependence o...

The enthalpy of sublimation of cubane

13 The sublimation enthalpy of cubane, a key reference material for force field and quantum mechanical computations, was measured by combining the vaporization enthalpy at T = 298.15 K to the sum of the fusion enthalpy measured at T = 405 K and a solid–solid phase transition that occurs at T = 394 K. The fusion and solid–solid phase transitions were measured previously. A sublimation enthalpy v...