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anonymous

  • one year ago

Describe in detail what you know about the enthalpy, entropy, and free energy changes when a sample of gas condenses to a liquid. How does temperature affect these changes?

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  1. anonymous
    • one year ago
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    @taramgrant0543664

  2. anonymous
    • one year ago
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    Canyou walk me through because I wanna understand it and not get the answer

  3. taramgrant0543664
    • one year ago
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    Yes so ummm let's start with enthalpy so this is the thermodynamic potential H=U+pV is one of the formulas that correspond to enthalpy

  4. anonymous
    • one year ago
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    what do that formula mean

  5. taramgrant0543664
    • one year ago
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    I was just about to put it lol so this formula is represented by the variables: H is the enthalpy of the system U is the internal energy of the system p is the pressure of the system V is the volume of the system. U is the value the is temperature dependent

  6. taramgrant0543664
    • one year ago
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    dU=TdS-pdV

  7. anonymous
    • one year ago
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    I swear it this look like encrypted codes or something

  8. taramgrant0543664
    • one year ago
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    Maybe I'll try a different way: Enthalpy describes the change in energy of a system. In the case of water, the "system" is the water itself. At constant pressure, enthalpy refers to changes in heat. An exothermic processes involves a negative change in enthalpy, or a loss of heat. As water vapor condenses into liquid, it loses energy in the form of heat. Therefore, this process is exothermic.

  9. anonymous
    • one year ago
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    Ok so what's free energy??

  10. taramgrant0543664
    • one year ago
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    We will get to that because we need to talk about entropy first or free energy won't make much sense

  11. taramgrant0543664
    • one year ago
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    Entropy is pretty much the amount of disorder In solids there is a low amount of disorder because in soilds there is a defined volume and shape In liquids the disorder increase because there is a define volume but no defined shape In gases chaos or disorder is high because the is no defined volume or shape the molecules are all over the place

  12. taramgrant0543664
    • one year ago
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    So going from a gas to a liquid you're creating order because you're going from a gas that is is complete disorder to a liquid that has more order

  13. taramgrant0543664
    • one year ago
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    So now there is free energy or Gibbs Free energy as it is also referred to as is the thermodynamic quantity equivalent to the capacity of a system to do work.

  14. taramgrant0543664
    • one year ago
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    It is represented by the equation dG=dH-TdS d is those little triangle delta things that normally mean "change in" G is the free energy H is enthalpy T is temperature S is entropy

  15. taramgrant0543664
    • one year ago
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    We know that dH is negative as heat is given off We also know dS is negative because it is going from a gas to a liquid

  16. taramgrant0543664
    • one year ago
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    dS is negative dH is negative At low temperatures -TdS will be to small to overcome dH So dG will be negative At high temperatures -TdS will be big so dG will be positive

  17. taramgrant0543664
    • one year ago
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    When ΔG is negative, a process or chemical reaction proceeds spontaneously in the forward direction. When ΔG is positive, the process proceeds spontaneously in reverse. When ΔG is zero, the process is already in equilibrium, with no net change taking place over time.

  18. arindameducationusc
    • one year ago
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    @taramgrant0543664 Awesome Explanation..

  19. anonymous
    • one year ago
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    Can you explain free energy changes like you did enthalpy??

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