zingchristina

30.01.2021 • 

Chemistry

Step 5: Explain the energy change in the reaction. a) Create a new blank document. Type your name at the top.
b) Write a few paragraphs describing the chemical reaction and explaining the energy change in
the reaction. Your document should:
i. identify the reactants and products.
ii. describe the change in energy that occurs as bonds are broken and formed.
iii. identify how the potential energy of the reactants compares to the potential energy of
the products.
iv. state and explain the net change in enthalpy.
v. identify whether the reaction is endothermic or exothermic.
vi. explain how energy is conserved between the reaction and the surrounding
environment.

Ответ:

ShiannBerry

04.12.2022

Chemistry

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C(alloy) = 0.965 J/g°C

Explanation:

In the problem, the Heat of the alloy = - (Heat of water + Heat of Calorimeter). This, could be written as:

m×C(alloy)×ΔT = - ( m×C(H₂O)×ΔT +m×C(Al)×ΔT)

Replacing knowing C(H₂O) = 4.184 J/g°C and C(Al) = 0.900 J/g°C:

50g×C(alloy)×(45°C - 350°C) = - ( 150g×4.184J/g°C×(45°C - 23°C) +46g×0.900J/g°C×(45°C-23°C))

15250g°C×C(alloy) = 14718J

C(alloy) = 0.965 J/g°C

I hope it helps!

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