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MY question (if I got it right):

Isomorphism is possible because of compatible

A) Ratio
B) Sizes
C) Shape
D) Color

hearthstone224 wrote:MY question (if I got it right):

Isomorphism is possible because of compatible

A) Ratio
B) Sizes
C) Shape
D) Color

Definitely B: Size. This is because the crystal structure of a given material is dependent on the radius of its atoms. Isomorphism means that two materials of different chemical composition have the same crystal structure. Ratio wouldn't really make sense because there is no hint at what the ratio would be comparing. The shape is more or less what isomorphism is, and color can be discarded immediately. This question has weird wording because it doesn't say what are the things that are compatible, but nevertheless, a worthwhile question to know the answer to.

Correct! The answer is Size because isomorphism does mean the same shape! Therefore compatible sizes are possible.

Yeah, wording is a bit funky but its only an invitational question. Your turn!

What is the name of the process by which a clay ceramic hardens under firing? Describe the microstructural changes of the ceramic during this process.

Tom_MS wrote:What is the name of the process by which a clay ceramic hardens under firing? Describe the microstructural changes of the ceramic during this process.

I googled some info but I'm not sure what name you are referring to- most of the sites I found just called the process "firing".

I found that the water molecules inside the clay are being evaporated out and therefore when that happens the structure cannot return back to normal and its sort of "locked in place", and this change is called the ceramic change.

hearthstone224 wrote:

Tom_MS wrote:What is the name of the process by which a clay ceramic hardens under firing? Describe the microstructural changes of the ceramic during this process.

I googled some info but I'm not sure what name you are referring to- most of the sites I found just called the process "firing".

I found that the water molecules inside the clay are being evaporated out and therefore when that happens the structure cannot return back to normal and its sort of "locked in place", and this change is called the ceramic change.

You're right about the water evaporating, but that is more in the drying process than the firing process. This is a difficult question, but I thought that it might be on a test under the manufacturing techniques section of the rules. If you're using the Callister textbook, its in the ceramic applications and processing section. If you're using something else, the name of the process is vitrification.

Ah, ok. Is this what you are looking for?

Vitrification is a process in which the materials that can melt, melt and then they fill in the little pores and gaps which promotes melting and compacting and thereby strengthens the entire body.

hearthstone224 wrote:Ah, ok. Is this what you are looking for?

Vitrification is a process in which the materials that can melt, melt and then they fill in the little pores and gaps which promotes melting and compacting and thereby strengthens the entire body.

Yep! Your turn.

Tom_MS wrote:

hearthstone224 wrote:Ah, ok. Is this what you are looking for?

Vitrification is a process in which the materials that can melt, melt and then they fill in the little pores and gaps which promotes melting and compacting and thereby strengthens the entire body.

Yep! Your turn.

Great. What is Vapor pressure, and how does it change as IMFs increase/decrease?

Vapor pressure is the equilibrium atmospheric pressure at which a substance will remain in its liquid state without evaporating further. In this way, it is a measure of something's tendency to evaporate. This means that if there are more IMFs, it will be harder for something to evaporate, and therefore the vapor pressure needed to maintain equilibrium is less. More IMFs means lower vapor pressure.