Risperdal (risperidone) FDA ALERT [04/2005] Risperdal is a type of medicine called an atypical antipsychotic. FDA has found that older patients treated with atypical antipsychotics for dementia had a higher chance for death than patients who did not take the medicine. This is not an approved use.
In chemistry, phase refers to one of the four states that a substance can exist in; liquid, solid, gas, or plasma. A phase has uniform composition and properties. A phase change is when a substance changes from one phase to another.Freezing is when a liquid changes phase and becomes a solid. Freezing involves the loss of energy in the form of heat. At freezing, not only is there a loss of energy, but there is also an increase in the order of the particles in the substance.n chemistry, phase refers to one of the four states that a substance can exist in; liquid, solid, gas, or plasma. A phase has uniform composition and properties. A phase change is when a substance changes from one phase to another. Every change has a different name.
This change from gas to liquid is a phase transition, and the energy released upon this transition is mainly dependent on the intermolecular interactions of the substance. Hence, to understand the refrigeration cycle used in modern refrigerators, it is necessary to first discuss phase transitions.