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При гидратации 6,72 л этилена (н.у.) выделилось 13,8 кДж тепло- ты. Составьте термохимическое уравнение этой реакции.
Ответы 1
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C2H4+HOH=>C2H5OHНайдем количество этилена: n= V / Vm; n= 6,72/22,4=0,3 мольДалее -составляем пропорцию : при гидратации 0,3 моль этилена выделяется 13,8 кДж теплоты, а при гидратации 1 моль - Х кДжХ = 46 кДж Корректнее конечно говорить о теплоте образования этилового спирта C2H5OH но так как его количество равно количеству этилена, пренебрежение не существенно. Итак, термохимическое уравнение реакции образования (1моль !!!) этилового спирта будет следующим:C2H4+HOH=>C2H5OH Q=46 кДж
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Автор:
jjochoa - 1 год назад
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Прочитайте текст. Определите, какие из приведённых утверждений соответствуют содержанию текста (1 – True), какие не соответствуют (2 – False) и о чём в тексте не сказано, то есть на основании текста нельзя дать ни положительного, ни отрицательного ответа (3 – Not stated).
Once upon a time there was an old man who dearly loved his only son.
His son enjoyed riding horses and swimming in the swift waters of mountain
rivers, but most of all he liked hunting. The old man was proud that his son was
full of courage but he was afraid of his passion for hunting. Once in a dream he
saw that his son would be killed by a huge lion. The poor father was afraid that
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please and entertain his son, the old man put paintings of every kind of animal in
one of the rooms. There was a buffalo, a wolf, an elephant, a rhino and deers in
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distract the young man from his boredom.
One day, he approached the painting and spoke angrily to the lion in it:
“You damned beast, it’s because of you and my father’s lying dream that I am
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of wood got under his fingernail and the young man could not get it out. The old
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young man died of the fierce fever. The lion, even though it was only a painted
one, had indeed killed the young man, just as his father had foreseen.
Тест
1. The old man’s son was against killing animals.
True
Faulse
Not stated
2. The son liked staying inside the house.
True
Faulse
Not stated
3. The old man decorated the house with the most expensive pictures.
True
Faulse
Not stated
4. The old man failed to save his son.
True
Faulse
Not stated
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Тест по чтению
Прочитайте текст. Определите, какие из приведённых утверждений соответствуют содержанию текста (1 – True), какие не соответствуют (2 – False) и о чём в тексте не сказано, то есть на основании текста нельзя дать ни положительного, ни отрицательного ответа (3 – Not stated).
Once upon a time there was an old man who dearly loved his only son.
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“You damned beast, it’s because of you and my father’s lying dream that I am
kept here in this prison. I can’t do what I want. I can neither climb the mountains
nor hunt in the forest. It’s your fault. What can I do to you?” And as he said
this, he struck his fist against the wall to blind the lion. But a small sharp piece
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man called for a doctor but the doctor wasn’t able to help his son. The finger
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one, had indeed killed the young man, just as his father had foreseen.
Тест
1. The old man’s son was against killing animals.
True
Faulse
Not stated
2. The son liked staying inside the house.
True
Faulse
Not stated
3. The old man decorated the house with the most expensive pictures.
True
Faulse
Not stated
4. The old man failed to save his son.
True
Faulse
Not stated
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