There are a few versions of this law. One is that heat flows spontaneously from hot to cold, but not in the reverse direction. Another is that there is no such thing as a 100% efficient heat engine. A third states that the entropy, or disorder, of a system may increase but will never decrease spontaneously.
Heat cannot, of itself, pass from a colder to a hotter body.( 010)
The notion that natural processes that occur in an isolated system are spontaneous when they lead to an increase in disorder, or entropy.
it is impossible for any system to undergo a cyclic process whose sole result is the absorption of heat from a single reservoir at a single temperature and the performance of an equivalent amount of work
In any conversion of heat energy to useful work, some of the initial energy input is always degraded to a lower-quality, more dispersed, less useful energy, usually low-temperature heat that flows into the environment; you cannot break even in terms of energy quality. See first law of thermodynamics.
States that in any real (irreversible) process, there is a decrease in free energy and an increase in entropy.
ΔG = ΔH - T S where ΔG is the change in Gibbs' Free-Energy and ΔS is the change in entropy. The second law of thermodynamics states that for a reaction to be ' spontaneous', ΔG must be negative overall. Another way of stating this is that for a reaction to be spontaneous, the overall entropy increase must be positive.
in any spontaneous process, there is always an increase in the entropy of the universe
scientific law that's easy to violate rhetorically with little fear of detection by the audience.
a law stating that mechanical work can be derived from a body only when that body interacts with another at a lower temperature; any spontaneous process results in an increase of entropy
the disorder in the universe always increases.
states that the entropy of the universe increases with time. This happens because particles always try to find their most probable distribution. This is the distribution that maximizes the number of available micro-states.
Entropy is always greater than or equal to zero. Entropy cannot decrease.
States that, with each successive energy transfer or transformation in a system, less energy is available to do work.
A fundamental law of energy exchange, one of whose formulations is "no process is possible whose only net effect is the flow of heat from a cold body to a hot one." A consequence of this is that in any system only part of the heat energy can be converted to other forms; the rest of the heat flows to lower temperature.
a statement that the entropy in a closed system never decreases, or alternatively, that processes that free energy must decrease if a change is to be thermodynamically favorable at constant tempera ture and pressure.
The universe tends toward a state of greater diorder in spontaneous processes.
"In a closed system, entropy increases". The reason that living things have to extract energy from their environment to stay alive, and why dead things get all icky and gross. Often misrepresented by Creationists as a reason why evolution cannot occur.
1. Each time energy is converted from one form to another, some of the energy is always degraded to a lower-quality, more dispersed, less useful form. 2. No system can convert energy from one form to another useful for with 100 percent efficiency. 3. Energy cannot be spontaneously transferred from a cold body to a hot body. 4. The entropy of a system increases over time.
The energy available after a chemical reaction is less than that at the beginning of a reaction; energy conversions are not 100% efficient.
The second law says that no process is 100% efficient because heat is always produced. Another way of stating this is that any process that does work produces heat. Still another way of stating this law is that in a closed system entropy tends to increase.
This law states that no device can completely and continuously transform all of the energy supplied to it into useful energy.
n: In any conversion of heat energy to useful work, some of the initial energy input is always degraded to lower quality, more dispersed, less useful energy -- usually low-temperature heat that flows into the environment; every energy system has "leaks" and looses energy or heat to attenuation.
The second law of thermodynamics is an expression of the universal law of increasing entropy. In simple terms, it is an expression of the fact that over time, differences in temperature, pressure, and density tend to even out in a physical system which is isolated from the outside world. Entropy is a measure of how far along this evening-out process has progressed.