If an equal mass of sugar and aluminum were poured into separate containers, which would require the smaller container?
2 answers:
Answer:
Aluminum
Explanation:
It is given that:
Mass of sugar = Mass of aluminum
The volume occupied by the two substances can be deduced from their densities.
Density of a substance is a constant and given by the ratio of its mass to volume.
Density of aluminum = 2.7 g/cm3
Density of Sugar = 1.59 g/cm3
Since the masses are equal we have:
Volume of Aluminum = 0.59 (Volume of sugar)
Therefore, aluminum will require a container of smaller volume
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Answer: see figure attached and explanation below.
Explanation:
1) Chemical equation (given):
Fe + CuCl₂ → Cu + FeCl₂
2) ΔHf reactants: -256 kJ/mol (given)
3) ΔHf products: - 321 kJ/mol (given)
4) ΔH reaction = ΔHf products - ΔHf reactants = - 321 kJ/mol - (- 256 kJ/mol) = - 65 kJ/mol
5) Conclusion:
i) Since ΔHf of products is less (more negative) than ΔHf of reactants, the reaction is exhotermic: the reaction released energy, which is the reason why the products content less potential energy than the reactants.
ii) Then, the energy diagram is the typical one of an exothermic reaction: the products start a certain potential energy level, the energy incrases until reaching the activation energy (the energy barrier to form the activated complex) and then energy decreases until a level below the energy of the reactants.
iii) See the attached figure with such kind of diagram showing the products at a lower level than the reactans
