Answer:
In homogeneous solute dissolves completely in latter it doesn't
homogeneous example: sugar and water
heterogeneous: oil and water
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Include in your answer:
-foam is a colloid.
-colloids include gas dispersed in a liquid.
-colloids include gas dispersed in a solid.
Answer:
a. Negative
b. Positive
c. Negative
d. zero
Explanation:
Entropy is measure of disorder. Positive entropy implies that a system is becoming more disordered. The opposite is true.
(a) N2(g)+3H2(g) → 2NH3(g) Negative because the system is becoming less disordered since the number of gaseous moles is decreasing
(b) CaCO3(s)→CaO(s)+CO2(g) Positive because a solid produces a gas which is more disorder therefore there is an increase in entropy
(c) 3C2H2(g)→C6H6(g) Negative because the number of moles of a gas decrease meaninng there is less disorder
(d) Al2O3(s)+3H2(g) → 2Al(s)+3H2O(g) zero because the gaseous moles do not change
The balanced equation for the neutralisation reaction is as follows
2LiOH + H₂SO₄ ---> Li₂SO₄ + 2H₂O
stoichiometry of LiOH to H₂SO₄ is 2:1
both LiOH and H₂SO₄ are strong bases and strong acids respectively, therefore they completely ionise into their respective ions
1 mol of H₂SO₄ is neutralised by 2 mol of H₂SO₄
therefore 2.0 mol of H₂SO₄ is neutralised by - 2 x 2.0 = 4.0 mol of LiOH
4.0 mol of LiOH is required to neutralise 2.0 mol of H₂SO₄
