11sai 11sai
  • 22-03-2020
  • Chemistry
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How do you do this question?? Please help!!!

How do you do this question Please help class=

Respuesta :

anfabba15
anfabba15 anfabba15
  • 22-03-2020

Answer:

940 J

Explanation:

This is a calorimtetry excersie where you apply the formula

Q = C . m . ΔT

We only have 2 data from here, C and ΔT (from the solution)

C → 3.97 J/g°C

ΔT → 2.3°C

We determine the solution's mass by density:

1.03 g/mL = Solution mass / Solution volume

We assume the HCl as the solution volume → 100 mL

1.03 g/mL . 100 mL = 103 g → solution's mass

We replace data: Q = 103 g . 3.97 J/g°C .  2.3°C → 940.4 J

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