Achieve Week 3+4, Question 9

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Charly Ng 1K
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Joined: Mon Jan 03, 2022 11:06 am

Achieve Week 3+4, Question 9

Postby Charly Ng 1K » Sat Jan 29, 2022 2:07 am

Question 9 of Achieve Week 3+4 states:

If you combine 370.0 mL of water at 25.00 ∘C and 120.0 mL of water at 95.00 ∘C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.

I solved this with the understanding that the energy released by one reaction will be absorbed by the other reaction so I used -Q=Q. However, I was wondering if it matters which values I use for the -Q and which values for Q. Will it make a difference or will the answer still come out the same no matter which side the values are plugged into?

Elsie_Lin_2K
Posts: 103
Joined: Fri Sep 24, 2021 5:08 am

Re: Achieve Week 3+4, Question 9

Postby Elsie_Lin_2K » Sat Jan 29, 2022 10:14 am

It does not matter what values you plug in for Q and what values you plug in for -Q. As long as the values you plug in on one side are consistent, then it should still be able to work.


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