Quite simply, just like anything else, cells need energy to work. The energy can't be created out of nothing (First Law), and usable energy gets converted to unusable energy, therefore new energy sources must be found (Second Law).
"Unavailable for doing work" is related to the Second Law of Thermodynamics.
The Second Law of Thermodynamics states that a system with no energy input and no losses will tend towards a zero energy state. This is essentially the entropy of any energy exchange. Thus, you require a constant input of energy to maintain any system.
Second Law of Thermodynamics
The Second Law of Thermodynamics.
Thermodynamics is both a law and a theory. It has a set of well-established laws, such as the first and second laws of thermodynamics, which describe the behavior of energy in systems. Additionally, the principles and concepts underlying thermodynamics are formulated into a theory to explain and predict the behavior of physical systems.
The second law of thermodynamics states that
The second law of thermodynamics in AP Biology helps explain how energy flows within living organisms. It states that energy transformations increase the disorder or entropy of a system. This law is important in understanding processes like metabolism and cellular respiration, which involve the transfer of energy and the production of waste heat.
By the first law of thermodynamics, energy is conserved - i.e. the sum of the useful work and the energy lost to heat will equal the energy you started with. The second law states that you will never get 100% energy efficiency.
"Unavailable for doing work" is related to the Second Law of Thermodynamics.
The Second Law of Thermodynamics states that a system with no energy input and no losses will tend towards a zero energy state. This is essentially the entropy of any energy exchange. Thus, you require a constant input of energy to maintain any system.
According to the second law of Thermodynamics, the amount of usable energy will continuously decrease.According to the second law of Thermodynamics, the amount of usable energy will continuously decrease.According to the second law of Thermodynamics, the amount of usable energy will continuously decrease.According to the second law of Thermodynamics, the amount of usable energy will continuously decrease.
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Entropy is a measure of disorder or randomness in a system. In the context of thermodynamics and the second law of thermodynamics, entropy tends to increase over time in isolated systems. This means that energy tends to disperse and become less organized, leading to a decrease in the system's ability to do work. The second law of thermodynamics states that the total entropy of a closed system will always increase or remain constant, but never decrease.
second law
Second Law of Thermodynamics
According to the second law of thermodynamics, the heat energy released by an organism is an unavoidable byproduct of metabolism. This heat is generated through metabolic processes that involve the conversion of chemical energy into heat energy as the organism carries out its various life functions. The second law states that energy tends to disperse and entropy increases in all natural processes, including those involving organisms.
The fact that usable energy is always lost in an energy transfer is due to the second law of thermodynamics. This law states that entropy, or disorder, tends to increase over time in a closed system, leading to the loss of usable energy in the form of heat.