Answer:
Heat of the reaction per mole of NaOH = 46.02 kJ/mol
Explanation:
The reaction between HCl (strong acid) and NaOH(strong base) is a neutralization reaction which yields a salt NaCl and water
The heat (q) of a reaction is given as:
where m = mass of the system
c = specific heat
T1 and T2 are the initial and final temperatures
It is given that:
Volume of HCl = 500.0 ml
Volume of NaOH = 500.0 ml
Density of HCl and NaOH = 1.000 g/ml
Total mass of the solutions, m = 500.0 +500.0 = 1000.0 g
c = 4.184 J/g/c
T1 = 25.6 C
T2 = 26.70 C
Substituting appropriate values in equation (1) gives:
Now, the number of moles of NaOH is:
Heat of reaction/mole NaOH is:
Homogeneous Mixture:
<span>It may be mistaken for a pure substance.
</span><span>It can be separated using distillation
</span>
Heterogeneous Mixture:
<span>Its components are visible
</span><span>It can be separated using distillation.
Concrete is an example of this kind of mixture.
</span>
Hope this helps!
There are three: Hydrogen, Nitrogen, and Oxygen.
Answer:
Melting
Explanation:
From solid to liquid, the change of state happening is the melting process. The kinetic energy of the particles that makes up the solid is increased and it allows the liquid to flow.
- A solid is a fixed mass with static molecules.
- When thermal energy is added, the kinetic energy increases.
- The kinetic energy of the particles increases and they vibrate about their fixed point in solids.
- This eventually breaks the structure and liquid which begins to flow forms.
This is a melting process.
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