if you want to remove an article from website contact us from top.

    the small bags of silica gel you often see in a new shoe box are placed there to control humidity. despite its name, silica gel is a solid. it is a chemically inert, highly porous, amorphous form of sio2. water vapor readily adsorbs onto the surface of silica gel, so it acts as a desiccant. despite not knowing mechanistic details of the adsorption of water onto silica gel, from the information provided, you should be able to make an educated guess about the thermodynamic characteristics of the process. predict the signs of δg, δh, and δs.

    James

    Guys, does anyone know the answer?

    get the small bags of silica gel you often see in a new shoe box are placed there to control humidity. despite its name, silica gel is a solid. it is a chemically inert, highly porous, amorphous form of sio2. water vapor readily adsorbs onto the surface of silica gel, so it acts as a desiccant. despite not knowing mechanistic details of the adsorption of water onto silica gel, from the information provided, you should be able to make an educated guess about the thermodynamic characteristics of the process. predict the signs of δg, δh, and δs. from EN Bilgi.

    The small bags of silica gel you often see in a new shoe box are placed there to control humidity. Despite its name, silica gel is a solid. It is a chemically inert, highly porous, amorphous form of S i O 2 . Water vapor readily adsorbs onto the surface

    Answer to: The small bags of silica gel you often see in a new shoe box are placed there to control humidity. Despite its name, silica gel is a...

    Thermodynamics

    The small bags of silica gel you often see in a new shoe box are placed there to control...

    The small bags of silica gel you often see in a new shoe box are placed there to control... Question:

    The small bags of silica gel you often see in a new shoe box are placed there to control humidity. Despite its name, silica gel is a solid. It is a chemically inert, highly porous, amorphous form of

    S i O 2 SiO2

    . Water vapor readily adsorbs onto the surface of silica gel, so it acts as a desiccant. Despite not knowing mechanistic details of the adsorption of water onto silica gel, from the information provided, you should be able to make an educated guess about the thermodynamic characteristics of the process. Predict the signs of

    Δ G , Δ H ΔG,ΔH , and Δ S ΔS .

    Spontaneous Reaction:

    Most chemical reactions are reversible, so they can reach an equilibrium state after some time. A spontaneous reaction will have this equilibrium state favor the formation of products, which generally means an equilibrium constant of

    K > 1 K>1

    . If the reaction is spontaneous at a given set of conditions, then it must have a certain sign for the free energy change

    Δ G ΔG

    . This thermodynamic parameter itself depends on the reaction's enthalpy and entropy changes at the given conditions, as well as the temperature. The signs of the enthalpy and entropy changes can usually be predicted for a given reaction. Here you must consider such details as the chemical bonds being broken/formed, as well as the net increase/decrease of disorder during product formation.

    Answer and Explanation:

    Become a Study.com member to unlock this answer! Create your account

    View this answer

    Silicon dioxide is a solid. Water vapor is gaseous water. Adsorption of water vapor on silica requires new interactions (chemical bonds) to be formed,...

    See full answer below.

    Become a member and unlock all Study Answers

    Start today. Try it now

    Create an account

    Ask a question

    Our experts can answer your tough homework and study questions.

    Ask a question

    Search Answers

    Learn more about this topic:

    Spontaneous Reactions & Gibbs Free Energy

    from

    Chapter 12 / Lesson 8

    4K

    Spontaneous reactions are processes that occur on their own without any outside interference. Review the definition of the spontaneous process, explore concepts such as enthalpy, entropy, and Gibbs free energy, and learn how to predict a spontaneous reaction.

    Related to this Question

    Related Answers Related Lessons Related Courses

    In the AS/AD model, an economy is in its steady...

    As a gasoline engine is running, an amount of...

    What kind of attractive forces must be overcome...

    Name the kinds of attractive forces that may be...

    Explore our homework questions and answers library

    Browse by subject

    Source : study.com

    The small bags of silica gel you often see in a new shoe box are placed there to control humidity. despite its name, silica gel is

    The small bags of silica gel you often see in a new shoe box are placed there to control humidity. despite its name, silica gel is a solid. it is a chemically inert, highly porous, amorphous form of sio2. because water vapor readily adsorbs onto the surface of silica gel, it acts as a desiccant. despite not knowing mechanistic details of the adsorption of water onto silica gel, from the information provided you should be able to make an educated guess about the thermodynamic characteristics of the process. predict the signs for δg, δh, and δs for the adsorption of water.

    Chemistry

    The small bags of silica gel you often see in a new shoe box are placed there to control humidity. despite its name, silica gel is

    The small bags of silica gel you often see in a new shoe box are placed there to control humidity. despite its name, silica gel is a solid. it is a chemically inert, highly porous, amorphous form of sio2. because water vapor readily adsorbs onto the surface of silica gel, it acts as a desiccant. despite not knowing mechanistic details of the adsorption of water onto silica gel, from the information provided you should be able to make an educated guess about the thermodynamic characteristics of the process. predict the signs for δg, δh, and δs for the adsorption of water.

    Answers

    So we look equation for the free Gibbs free energy (ΔG) which depends on entalpy (ΔH), temperature (T) and entropy (ΔS):

    ΔG = ΔH - TΔS

    ΔG is negative (-) because the water absorption on the silica gel surface is a spontaneous process.

    ΔH is negative (-) because the water absorption on the silica gel surface is a exothermic process (it releases heat and if you want to desorb the water form the silica gen you need to add heat which is a endothermic process).

    ΔS is negative (-) because the water is adsorbed, so from disorderly state you take the water molecules and put them in a orderly state and by doing that you decrease the entropy.

    Maybe you like

    A solid substance turns into a liquid. Which best describes this change?

    What is the percent yield for the reaction pcl3(g) + cl2(g) ? pcl5(g) if 119.3 g of pcl5 (?

    Use the given molar solubilities in pure water to calculate ksp for each compound. part a bacro4; molar solubility =1.08×10−5m

    Most halogens form compounds by

    Using a skeletal structure, draw the structure for (4R,5S)−4,5−diethyloctane.

    Source : fornoob.com

    Sapling #10 WK5/6

    CHEMISTRY COMMUNITY

    Quick links FAQ Login Board index Chem 14B Thermodynamics

    Gibbs Free Energy Concepts and Calculations

    Search 115 Save Email Link

    Sapling #10 WK5/6

    Moderators: Chem_Mod, Chem_Admin

    Post Reply

    4 posts • Page 1 of 1

    Melody Haratian 2J

    Sapling #10 WK5/6

    Quote

    PostSun Feb 14, 2021 10:41 am

    Hey guys, does anyone know how to find ΔH in this problem? The problem is #10 from sapling Wk 5/6:

    The small bags of silica gel you often see in a new shoe box are placed there to control humidity. Despite its name, silica gel is a solid. It is a chemically inert, highly porous, amorphous form of SiO2. Water vapor readily adsorbs onto the surface of silica gel, so it acts as a desiccant.

    Despite not knowing mechanistic details of the adsorption of water onto silica gel, from the information provided, you should be able to make an educated guess about the thermodynamic characteristics of the process. Predict the signs of ΔG, ΔH, and ΔS.

    Top Will Skinner

    Re: Sapling #10 WK5/6

    Quote

    PostSun Feb 14, 2021 10:54 am

    Once you determine the signs of ΔG and ΔS, look at the equation ΔG = ΔH - TΔS. Since ΔG is negative in this case, you have to determine which sign of ΔH keeps ΔG negative (also given the sign of ΔS).

    Top Scot Widjaja Dis 1J

    Re: Sapling #10 WK5/6

    Quote

    PostSun Feb 14, 2021 10:56 am

    Since we know that the reaction is spontaneous because it is occurring naturally, we know delta G has to be negative. We also know that delta S is negative because a solid molecule has more order. Given that delta S is positive, n order for delta G to be negative, delta H has to be negative according to the equation:

    Delta G = Delta H - T * Delta S

    Top Megan Lu 3D

    Re: Sapling #10 WK5/6

    Quote

    PostSun Feb 14, 2021 12:16 pm

    Hi! Like others have mentioned above, we can start by looking at ∆G. Because this reaction is spontaneous, ∆G must be negative. Because the water molecules are moving from a more mobile form (gaseous) to being bound to the solid silica gel, ∆S must be negative. We can then apply this to the Gibbs equation, ∆G = ∆H - T∆S. If ∆S must be negative, and the temperature T is always positive in Kelvins, then ∆H must be a very negative value to make ∆G negative. Hope this helps!

    Top Post Reply

    4 posts • Page 1 of 1

    Return to “Gibbs Free Energy Concepts and Calculations”

    Jump to

    WHO IS ONLINE

    Users browsing this forum: No registered users and 0 guests

    Board index The team Contact us

    Powered by phpBB® Forum Software © phpBB Limited

    Source : lavelle.chem.ucla.edu

    Do you want to see answer or more ?
    James 11 month ago
    4

    Guys, does anyone know the answer?

    Click For Answer