Sodium + Silverchloride —> makes what?
2 answers:
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Answer : The enthalpy change for the solution is 166.34 kJ/mol
Explanation :
First we have to calculate the enthalpy change of the reaction.
Formula used :
where,
= change in enthalpy = ?
C = heat capacity of water =
m = total mass of sample = 2.174 + 127.4 = 129.6 g
= initial temperature =
= final temperature =
Now put all the given values in the above expression, we get:
Now we have to calculate the moles of AX added to water.
Now we have to calculate the enthalpy change for the solution.
As, 0.04592 moles releases heat = 7638.36 J
So, 1 moles releases heat =
Therefore, the enthalpy change for the solution is 166.34 kJ/mol
Explanation:
The chemical reaction equation will be as follows.
As 1 mole reacts with 1 mole of
Hence, moles of = Molarity × Volume (in mL)
= 0.5 × 38.0 mL
= 0.019 mol
Moles of = Molarity × Volume (in mL)
= 0.6 × 42.0 mL
= 0.0252 mol
As moles of CuS is less than the moles of . This means that CuS is the limiting reagent.
Thus, maximum moles of CuS formed are 0.019 mol. As molar mass of CuS is 95.6 g/mol.
Therefore, maximum mass of CuS can be formed is
= 1.8164 g
Thus, we can conclude that maximum mass of CuS formed is 1.8164 g.