q=-mCΔT (1 Viewer)

[JackPatel]

Does anyone have worksheets based on this equation: q=-mCΔT ------ with answers (doesn't really matter)
And also if you guys have any worksheets based on other calculations in chemistry, please upload it.
I will really appreciate it.

Thanks.

 

[Zoinked]

https://www.boardofstudies.nsw.edu.au/hsc_exams/hsc2009exams/pdf_doc/2009-hsc-exam-chemistry.pdf - Question 20. Look at the question and try and solve it. If not i posted the sample answer the board of studies gives below.

<spoiler>
q = m × C × ΔT
q = 210 × 4.18 × 65
q = 57057
q = 57.057 kJ
Now ΔHComb = q
n
57.057
n = C2H5OH 1367

n = 0.04174 mol
C2H5OH
∴ mC = n × MM
2H5OH C2H5OH
∴ m = 0.04174 × 46.068 C2H5OH
∴ mC2H5OH = 1.923 g
Now 50% of heat has been lost to surroundings.
∴ inital m = 2 × 1.920 g C2H5OH
∴ inital m = 3.846 g C2H5OH
∴ inital m = 3.8 g
</spoiler>

 

[JackPatel]

Thanks