Magnesium Reacting With Acids, molar enthelpy

Thread starter xodreamxo
Start date Mar 29, 2015
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Acids Magnesium

In summary, when magnesium reacts with acids, it produces magnesium salts and hydrogen gas. Molar enthalpy, represented by the symbol ΔH, is a measure of the energy released or absorbed during a chemical reaction per mole of a substance. The molar enthalpy of magnesium reacting with acids can vary, but is typically around -462 kJ/mol. Factors such as concentration, temperature, surface area, and catalysts can affect the rate and extent of the reaction. This highly reactive metal loses electrons to form positively charged ions, while the hydrogen ions from the acid gain electrons to produce hydrogen gas.

Mar 29, 2015

xodreamxo

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Mg(s) + 2HCl (aq) --> H2(g) + MgCl2(aq) + heatMg (s) + H2SO4(aq) --> H2 (g) + MgSO4 (aq) + heatMg(s) + 2C2H4O2(aq) --> H2 (g) + Mg(C2H3O2)2 (aq) + heat

Which reaction will produce the great molar enthalpy and which the least? Why?

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Mar 29, 2015

Matternot

Gold Member

What do you think determines the molar enthalpy?

What is the reaction between magnesium and acids?

When magnesium reacts with acids, it produces magnesium salts and hydrogen gas. The reaction can be represented by the equation:

Mg + 2HCl → MgCl2 + H2

What is molar enthalpy?

Molar enthalpy is a measure of the energy released or absorbed during a chemical reaction, per mole of a substance. It is represented by the symbol ΔH and is typically measured in units of kilojoules per mole (kJ/mol).

What is the molar enthalpy of magnesium reacting with acids?

The molar enthalpy of magnesium reacting with acids can vary depending on the specific acid used and the conditions of the reaction. However, on average, the molar enthalpy is around -462 kJ/mol.

What factors can affect the reaction between magnesium and acids?

The rate and extent of the reaction between magnesium and acids can be influenced by factors such as concentration of the acid, temperature, surface area of the magnesium, and the presence of any catalysts. These factors can affect the molar enthalpy of the reaction as well.

Why does magnesium react with acids to produce hydrogen gas?

Magnesium is a highly reactive metal and tends to lose its outermost electrons in a chemical reaction. When it reacts with an acid, the magnesium atoms lose electrons and form positively charged ions, while the hydrogen ions from the acid gain electrons and form hydrogen gas. This exchange of electrons is what produces the hydrogen gas in the reaction.