Chemistry Conversion of Orthophosphoric acid to Pyro and Meta Phosphoric acid

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The discussion revolves around the conversion of orthophosphoric acid to pyro and meta phosphoric acids, focusing on their states at given temperatures. Participants express confusion over the reported answer indicating a solid state when the conversion temperatures exceed the melting points of both acids, suggesting they should be liquid. Clarifications indicate that the final state of the acids is assessed at room temperature after cooling, which could explain the solid state. The conversation highlights the importance of distinguishing between conversion temperatures and final product states. Ultimately, the consensus leans towards both acids being solid at room temperature after the conversion process.
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Homework Statement
Question pic is in My attempt.
Relevant Equations
Melting point of Pyrophosphoric acid
Melting point of Metaphosphoric acid
20200416_191355.png


I know that both Pyro and Meta phosphoric acid exists in solid form.But the temperature mentioned here are more than melting points of both.
So the acids will be obtained in liquid state.But the answer was given as b).
I can't make out the reason.Please explain.
 
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Physics lover said:
Homework Statement:: Question pic is in My attempt.
Relevant Equations:: Melting point of Pyrophosphoric acid
Melting point of Metaphosphoric acid

View attachment 260752

I know that both Pyro and Meta phosphoric acid exists in solid form.But the temperature mentioned here are more than melting points of both.
So the acids will be obtained in liquid state.But the answer was given as b).
I can't make out the reason.Please explain.
I think the answer given is wrong.Please confirm it.
 
The question doesn't say anything about the temperature of the final state, it just lists temperature at which conversion takes place.
 
Borek said:
The question doesn't say anything about the temperature of the final state, it just lists temperature at which conversion takes place.
I cannot understand that.How can final temperature be lower than supplied temperature.Please explain a little bit.
 
You heat up the acid to convert it, you leave it to cool down, you report state of the product at the room temperature.
 
Borek said:
You heat up the acid to convert it, you leave it to cool down, you report state of the product at the room temperature.
Ok so the answer would be both solid?
 

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