Question

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Answer 1

Answer:

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Identify types of reactions in two ways

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1. Acid base neutralization

An acid neutralizes a base when they react with each other and respective salt and water are formed.

Acid + Base → Salt + Water

Since, the reaction between acid and base both neutralize each other, hence, it is also known as Neutralization Reaction.

Examples:

Sodium chloride and water are formed when hydrochloric acid reacts with sodium hydroxide (a strong base).

HCl(aq) + NaOH ---> NaCl + H2O

2. combustion of coal in air

The air is first heated by the coal ash, and then reacts with the high temperature coal char. The combustion reaction produces CO2 and releases a large amount of heat, resulting in the rapid rise in the bed temperature. The oxygen will be finally used up with the progressing of the oxidizing reaction.

chemical reactions :

C + O2 = CO2 + 8084 Kcal/ Kg of carbon (33940 KJ/Kg) S + O2 = SO2 + 2224 Kcal/Kg of sulfur (9141 KJ/Kg) 2 H2 + O2 = 2 H2O + 28922 Kcal/Kg of hydrogen (142670 KJ/Kg)

3.heating the limestone

heating the limestone (calcium carbonate) drives off carbon dioxide gas leaving behind lime, the base calcium oxide. The lime is white and will have a more crumbly texture than the original limestone. Calcium carbonate does not react with water

limestone is heated strongly, the calcium

calcium carbonate → calcium oxide + carbon dioxide

CaCO 3(s) → CaO(s) + CO 2(g)

Answer 2

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1. Acid base neutralization

An acid neutralizes a base when they react with each other and respective salt and water are formed.

Acid + Base → Salt + Water

Since, the reaction between acid and base both neutralize each other, hence, it is also known as Neutralization Reaction.

Examples:

Sodium chloride and water are formed when hydrochloric acid reacts with sodium hydroxide (a strong base).

HCl(aq) + NaOH ---> NaCl + H2O

2. combustion of coal in air

The air is first heated by the coal ash, and then reacts with the high temperature coal char. The combustion reaction produces CO2 and releases a large amount of heat, resulting in the rapid rise in the bed temperature. The oxygen will be finally used up with the progressing of the oxidizing reaction.

chemical reactions :

C + O2 = CO2 + 8084 Kcal/ Kg of carbon (33940 KJ/Kg) S + O2 = SO2 + 2224 Kcal/Kg of sulfur (9141 KJ/Kg) 2 H2 + O2 = 2 H2O + 28922 Kcal/Kg of hydrogen (142670 KJ/Kg)

3.heating the limestone

heating the limestone (calcium carbonate) drives off carbon dioxide gas leaving behind lime, the base calcium oxide. The lime is white and will have a more crumbly texture than the original limestone. Calcium carbonate does not react with water

limestone is heated strongly, the calcium

calcium carbonate → calcium oxide + carbon dioxide

CaCO 3(s) → CaO(s) + CO 2(g)