Question

Виберіть із кожної пари наведених реакцій ту, яка має більше швидкість. Припустіть, що умови перебігу реакцій однакові. а) Горіння деревини та горіння вугілля;б) взаємодіє з водою натрію та взаємодії з водою заліза.​

Answer 1

Ответ:

метан, як і більшість органічних сполук, є горючою речовиною. На повітрі він горить блакитним полум"ям. CH4+2O2=Co2+ H2O Якщо повітря не достатньо, то при горінні може утворюватися чадний газ.При повному згорянні утворюється H2O і CO2 

Answer 2

Reaction Rates Comparison

When comparing the reaction rates of different reactions, we need to consider the conditions under which the reactions occur. Assuming the conditions are the same, let's compare the reaction rates of the following pairs of reactions:

a) Burning of wood vs. burning of coal b) Reaction of sodium with water vs. reaction of iron with water

Burning of Wood vs. Burning of Coal

When comparing the burning of wood and the burning of coal, it is important to note that both processes involve the combustion of carbon-based materials. However, the reaction rates may differ due to factors such as the composition and structure of the materials.

Based on available information, it is difficult to determine which reaction has a higher speed without further details or experimental data. The reaction rates can be influenced by various factors, including the size and surface area of the materials, the presence of catalysts, and the availability of oxygen. Therefore, it is necessary to conduct experiments or provide more specific information to determine the relative reaction rates of burning wood and burning coal.

Reaction of Sodium with Water vs. Reaction of Iron with Water

The reaction of sodium with water and the reaction of iron with water are both examples of metal-water reactions. These reactions involve the displacement of hydrogen from water by the metal.

In general, alkali metals like sodium are highly reactive with water, while most transition metals like iron do not react vigorously with water. Therefore, the reaction of sodium with water is expected to have a higher reaction rate compared to the reaction of iron with water. Sodium reacts violently with water, producing hydrogen gas and sodium hydroxide. On the other hand, iron reacts slowly with water, forming iron(II) hydroxide and hydrogen gas.

The higher reactivity of sodium compared to iron can be attributed to the differences in their electronic configurations and the ease with which they can lose electrons to form positive ions. Sodium readily loses an electron to form a sodium ion, while iron is less likely to lose electrons due to its higher ionization energy.

In conclusion, when comparing the reaction rates of the given pairs of reactions, it is difficult to determine the relative speed of burning wood vs. burning coal without further information or experimental data. However, the reaction of sodium with water is expected to have a higher reaction rate compared to the reaction of iron with water, based on the reactivity of the metals involved.