Презентация на тему Theoretical principles of bioenergetics

Презентация на тему Theoretical principles of bioenergetics, предмет презентации: Физика. Этот материал содержит 11 слайдов. Красочные слайды и илюстрации помогут Вам заинтересовать свою аудиторию. Для просмотра воспользуйтесь проигрывателем, если материал оказался полезным для Вас - поделитесь им с друзьями с помощью социальных кнопок и добавьте наш сайт презентаций ThePresentation.ru в закладки!

Слайды и текст этой презентации

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


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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.


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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.


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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.


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Isolated system is a system which exchanges neither mass nor energy with environment.

Closed system is a system which exchanges energy but doesn’t exchange mass with environment.

Open system is a system which exchanges both mass and energy with environment.

All biological systems are open systems


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Homogeneous system is a system, which consists of only one phase.
Heterogeneous system consists of several phases.

Phase is a part of a system, which is separated by the interfacial area while its crossing the properties change stepwise.


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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











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Enthalpy
is the function of state the increment of which is equal to heat which the system gets in isobaric process.


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Hess’s law

The heat of a reaction is independent of the way, in which this reaction occurs, and only depends upon the initial and final states of a system.


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The second law of thermodynamics:

In isolated systems processes occur spontaneously on condition of entropy increase.

Т∆S = ∆Q
(connected energy)





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Living organisms
are open systems that exchange their matter and energy with the environment.



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