help pls (1 Viewer)

[kkk579]

for this q, i may be incorrect but are none of the given options correct? X > Z, Z > Y and X > Y. Therefore, X> Z > Y in terms of reactivity.

also can anyone explain to me how heterogenous catalysts work and also explain the concept of bond atomisation and how it relates to bond enthalpies. yes ive tried searching and im still confused.

 

[kkk579]

bump

 

[Steve 340]

It's A, X<Z not more as it gets displaced by Z.

 

[kkk579]

It's A, X<Z not more as it gets displaced by Z.

Oh righttt i didnt pay attention to the order of the reaction

 

[hihglightermmmm]

for this q, i may be incorrect but are none of the given options correct? X > Z, Z > Y and X > Y. Therefore, X> Z > Y in terms of reactivity.

also can anyone explain to me how heterogenous catalysts work and also explain the concept of bond atomisation and how it relates to bond enthalpiesView attachment 43705. yes ive tried searching and im still confused.

I dont know

 

[kkk579]

bump

 

[kkk579]

bump

 

[kkk579]

bump @carrotsss @liamkk112 @Average Boreduser @Masaken pls help gods

 

[Average Boreduser]

bump @carrotsss @liamkk112 @Average Boreduser @Masaken pls help gods

Gurl u gotta persevere omfg

 

[kkk579]

Gurl u gotta persevere omfg

girl i need to know what bond atomisation is it confuses me so much and also heterogenous catalysts the internet is not giving me a good answer at all

 

[kkk579]

where are all the chem nerds when i need them most

 

[Masaken]

bump @carrotsss @liamkk112 @Average Boreduser @Masaken pls help gods

help it's been a while since i did chem but it's A right
Z displaces X so Z more reactive than X
Z also displaces Y so it's more reactive than Y
no visible reaction for the third one means Y doesn't displace X so X is more reactive than Y
combining this info together in order of increasing reactivity it's Y < X< Z (A)

girl i need to know what bond atomisation is it confuses me so much and also heterogenous catalysts the internet is not giving me a good answer at all

those chem concepts were never brought up during my 2 years of doing chemistry for prelims and hsc it's ok u don't need to know them
enthalpy of atomisation in particular isn't covered in mod 4, vaporisation and the other term i forgot is

 

[Average Boreduser]

for this q, i may be incorrect but are none of the given options correct? X > Z, Z > Y and X > Y. Therefore, X> Z > Y in terms of reactivity.

also can anyone explain to me how heterogenous catalysts work and also explain the concept of bond atomisation and how it relates to bond enthalpiesView attachment 43705. yes ive tried searching and im still confused.

Heterogenous catalysts are catalysts that are diff state to reactants but has a surface area that is capable of ‘adsorbing’ reactants and doing this mechanism thingo that weakens the bonds of the reactants and therefore reduces ea required for the reaction to occur iirc (or at least from my tutor- altho the mechanism prolly wack tho icl) and also not in syllabus sis ‍

 

[kkk579]

help it's been a while since i did chem but it's A right
Z displaces X so Z more reactive than X
Z also displaces Y so it's more reactive than Y
no visible reaction for the third one means Y doesn't displace X so X is more reactive than Y
combining this info together in order of increasing reactivity it's Y < X< Z (A)


those chem concepts were never brought up during my 2 years of doing chemistry for prelims and hsc it's ok u don't need to know them
enthalpy of atomisation in particular isn't covered in mod 4, vaporisation and the other term i forgot is

yeah idk peak briefly mentioned bond atomisation and heterogenous catalysts so i wanted to know in case for my mock prelim exam on sat

 

[wizzkids]

There is no single explanation for how a heterogeneous catalyst works. A heterogeneous catalyst is usually a solid (or it could sometimes be an immiscible liquid) but it presents a surface to the reactants that accelerates the rate of reaction. A good example would be a Ziegler-Natta catalyst used in the production of polyethylene plastic. The catalyst has crystals of titanium chloride and diethylaluminium chloride carried on small solid spheres of crystalline silica. The ethene gas phase circulates through a packed bed of the catalyst which vastly accelerates the polymerisation reaction. The reaction mechanism that takes place on the catalyst has a much lower activation energy and higher reaction probability than the reaction in the gas phase. A lot of chemists are employed in developing new heterogeneous catalysts because they can be very profitable.