Theoretical principles of bioenergetics презентация

Zaporizhzhya State Medical University Analytical Chemistry Department THEORETICAL PRINCIPLES OF BIOENERGETICS Lecturer: Monaykina Yulia Vitalievna 2016

Chemical thermodynamics studies the conditions of chemical systems stability and the laws under which they change to achieve maximum stability – the state of chemical equilibrium. It allows foreseeing a definite chemical reaction proceeding in a given chemical system, as well as the direction of equilibrium shift in the system in accordance with the change of temperature, pressure and agents concentration.

Bioenergetics is a field of thermodynamics that deals with biosystems. The energy of reactions is studied by the branch of thermodynamics called thermochemistry or chemical thermodynamics.

Thermodynamic system – is a body or a group of bodies, which interact whith each other and are separated from the environment by a real or imaginary surface.

The first law of thermodynamics The first law of thermodynamics (determines the relationship between internal energy, heat and work): An increase of the internal energy of a system is equal to the heat which is received by the system from the outside except for the work produced by the system against external forces: ∆U = Q – A