Three weeks ago, we lost our chemistry thirty teacher. Our new teacher is not extreme

Oct 2018
3
0
calgary
We were hoping to find help with this question:

What is the final temperature of water if 2.10 grams of methane is burned (molar enthalpy change -802.5kJ/mol) to heat up 400grams of water that is initially at 22.0 degrees celsius?

Earlier in our notes it says while using n(delta)Hm = mc(delta)t, we should use either joules/grams OR kilojoules/kilograms.

In the question, our teacher used 802.5 kJ with 400 grams. We are confused, please help us find the answer.


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Oct 2018
3
0
calgary
This was a class-wide example question within our notes. The teacher got something around 22.6.


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Oct 2018
17
0
Zimbabwe
Hi Emma!

Did you finally find help with your question? Am also interested in finding out.

Brumer
 
Oct 2018
3
0
calgary
Unfortunately, no we don’t yet have a concrete answer.


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