4 years ago

Why do some salts dissolve spontaneously even though the process is endothermic overall?

1 answer:

3 0

The process of ionic compounds like salts dissolving into an aqueous or other kind of polar solvent is independent of the fact of whether or not the process is endo or exothermic. The amount of heat energy needed is very very small.

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3 years ago

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Consider the following reaction:

Vadim26 [7]

Answer:The balanced equation of Mg(s) + 2HCl(aq) ==> MgCl2(aq) + H2(g) does NOT tell you how many moles of Mg or H2 are present. It only tells you the MOLE RATIO of the reactants and products. Thus, 1 mole Mg reacts with 2 moles HCl to produce 1 mole of hydrogen gas.

Explanation:The balanced equation of Mg(s) + 2HCl(aq) ==> MgCl2(aq) + H2(g) does NOT tell you how many moles of Mg or H2 are present. It only tells you the MOLE RATIO of the reactants and products. Thus, 1 mole Mg reacts with 2 moles HCl to produce 1 mole of hydrogen gas.

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rjkz [21]

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3 years ago

Which material has been recycled for over 3,000 years?

Juliette [100K]

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atomic mass=Protons+Neutrons=29+35=64

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