# Thread: The temperature at which water boils is higher than that of water

1. Key Member
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## The temperature at which water boils is higher than that of water

"The temperature at which water boils is higher than that of water". I would like to ask that if this self-made sentence is grammatically correct and natural?

Thank you.

2. Moderator
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## Re: The temperature at which water boils is higher than that of water

Its grammar is OK but it fails the logic test. The temperature at which water boils is exactly the same as that of water which is boiling; it's higher than that of water which isn't boiling; and it's lower than that of superheated water.

3. ## Re: The temperature at which water boils is higher than that of water

Originally Posted by hhtt21
"The temperature at which water boils is higher than that of water". I would like to ask whether this self-made sentence is grammatically correct and natural?

Thank you.
.

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## Re: The temperature at which water boils is higher than that of water

Originally Posted by probus
.
But aren't whether and if interchangeable for this kind of case?

Thank you.

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## Re: The temperature at which water boils is higher than that of water

What do you think about this: The temperature at which water boils at a higher pressure is higher than that of which boils at a lower pressure?

Thank you.

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## Re: The temperature at which water boils is higher than that of water

Put a period after higher and before that and get rid of the rest.

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## Re: The temperature at which water boils is higher than that of water

Originally Posted by hhtt21
What do you think about this: The temperature at which water boils at a higher pressure is higher than that of at which it boils at a lower pressure?
That's better, with my corrections. You can express the same fact more directly with fewer words: The boiling point of water increases with pressure.
Replace "boiling point" with "temperature at which water boils" if you want to avoid a term which might require clarification.

8. ## Re: The temperature at which water boils is higher than that of water

Yes they are. Your "that" makes it wrong.

I would like to ask "if"... not "that if".

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## Re: The temperature at which water boils is higher than that of water

Originally Posted by andrewg927
Put a period after higher and before that and get rid of the rest.
I cannot understand this so would you please write it openly (frankly/clearly)?

Thank you.

10. Senior Member
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## Re: The temperature at which water boils is higher than that of water

Your original sentence: The temperature at which water boils at a higher pressure is higher than that of which boils at a lower pressure?
My suggestion: The temperature at which water boils at a higher pressure is higher.

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