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gfd43tg
Gold Member
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Hello
I am curious, why is the heat if mixing negative? Why would mixing decrease the enthalpy?
I am curious, why is the heat if mixing negative? Why would mixing decrease the enthalpy?
Mixing decreases the enthalpy because it increases the randomness of the particles in a system, leading to a decrease in the system's energy and therefore its enthalpy. This is known as the mixing entropy effect.
Mixing decreases the enthalpy of a substance by breaking the attractive forces between particles and increasing the disorder of the system. This results in a decrease in the overall energy of the system, leading to a decrease in enthalpy.
In some cases, mixing can actually increase the enthalpy of a substance. This occurs when the mixing process requires energy, such as when mixing two substances with different temperatures or when mixing substances that undergo a chemical reaction.
The enthalpy change during mixing can be influenced by various factors, such as the nature and strength of the intermolecular forces between particles, the temperature and pressure of the system, and the number of particles involved in the mixing process.
Mixing can affect the stability of a system by either increasing or decreasing its enthalpy. If mixing decreases the enthalpy, the system becomes more stable as it has lower energy and is in a more favorable state. However, if mixing increases the enthalpy, the system becomes less stable as it requires more energy and is in a less favorable state.