Question

Очень нужна помощь, желательно расписать Используя термохимическое уравнение 2 H2 + O2 = 2 H2О + 572 кДж , рассчитайте, сколько выделится энергии при получении 3 моль воды.

Answer 1

Из 2 моль получается 574 кДж, из 3 моль получится х.
2 моль ——572 кДж
3 моль ——х кДж

х=3•572/2=858(кДж)

Ответ: 858кДж.

Answer 2

Calculation of Energy Released in the Formation of 3 Moles of Water

To calculate the amount of energy released in the formation of 3 moles of water, we can use the given thermochemical equation:

2 H2 + O2 = 2 H2O + 572 kJ

From this equation, we can see that the formation of 2 moles of water releases 572 kJ of energy. Therefore, we need to determine how much energy is released for the formation of 1 mole of water.

To find the energy released for the formation of 1 mole of water, we can divide the energy released for the formation of 2 moles of water by 2:

572 kJ / 2 = 286 kJ

So, the energy released for the formation of 1 mole of water is 286 kJ.

Now, we can calculate the energy released for the formation of 3 moles of water by multiplying the energy released for 1 mole of water by 3:

286 kJ * 3 = 858 kJ

Therefore, when 3 moles of water are formed, 858 kJ of energy will be released.

Please note that the above calculation assumes that the reaction is taking place under standard conditions.