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A snapshot of the summary - Biochemistry
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I.1 Energies
This is a preview. There are 22 more flashcards available for chapter 29/10/2018
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The laws of thermodynamics distinguish between a system and its surroundings. What do these terms refer to?A system refers to the matter within a defined region of space.
The matter in the rest of the universe is called the surroundings. -
What are examples of a system?A molecule, a cell, an organism, a glass of water, a train
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What is inner energy?Inner energy (U) is a fundamental quantity that every system possesses. It allows us to predict how much work the system could remade to do, or how much heat it can produce.
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Name 4 examples of state variables1. Position
2. Volume
3. Temperature
4. Pressure -
When does enthalpy change?Enthalpy changes when making or breaking chemical bonds and interactions.
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Which 2 state variables do we discriminate in?1. Intensive
2. Extensive -
What happens to the extensive and intensive variables if you combine 2 systems?The intensive variables add up, the intensive variable do not
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What are the two ways entropy changes can be described?
- As the effect of the transfer of a certain amount of heat into or out of the system at a given temperature.
- As change of the behavior of the particles contained in a system and the probability to encounter a particular situation.
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What is the result of a difference in intensive variables?A difference in intensive variables leads to an exchange of extensive variable
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Where does U stand for?The amount of internal energy
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