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Answer :
The total heat evolved in the solution is 2066 J.
we can use the formula:
q = mcΔT
where q is the heat evolved, m is the mass of the solution, c is the specific heat capacity of the solution, and ΔT is the change in temperature.
First, we need to calculate the mass of the solution
m = 40.6 g
Next, we need to calculate the specific heat capacity of the solution. Since we are using equal volumes of NaOH and HCl, we can assume the resulting solution is neutral (pH = 7) and has a specific heat capacity close to that of water, which is 4.184 J/g°C.
c = 4.184 J/g°C
Now we can calculate the change in temperature (ΔT):
ΔT = 38.2°C - 26.5°C = 11.7°C
Finally, we can calculate the total heat evolved (q) using the formula:
q = mcΔT = (40.6 g) (4.184 J/g°C) (11.7°C) = 2066 J
Therefore, the total heat evolved in the solution is 2066 J.
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