Question

What is Gay lussac law of combing
Volumes?

With equation

And example?

✏✏✏No sparm ans✏✏✏

Answer 1

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➡Gay Lussac’s Law of Combining Volumes states that when gases react, they do so in volumes which bear a simple ratio to one another, and to the volume of the product(s) formed if gaseous, provided the temperature and pressure remain constant.

➡The law explains experimental facts about how gaseous atoms combine. Example:

➡For the reactions:

(i) N2(g) + 3H2(g) → 2NH3(g)

1 vol. 3 vols. 2 vols.

1 volume of nitrogen combines with 3 volumes of hydrogen to form 2 volumes of ammonia.

(ii) 2H2(g) + O2(g) → 2H2O(g)

2 vols. 1 vol. 2 vols.

➡2 volumes of hydrogen combine with 1 volume of oxygen to form 2 volumes of steam.

(iii) Cl2(g) + H2(g) → 2HCl(g)

1 vol. 1 vol. 2 vols.

➡1 volume of chlorine gas combines with 1 volume of hydrogen to form 2 volumes of hydrochloric acid.

Question: Consider the reaction: 2H2(g) + O2(g) → 2H2O(g)

(a). What volume of steam is formed from 20 cm3 of hydrogen and 20 cm3 of oxygen mixed together?

(b). What gas(s) is in excess, and by what amount?

Solution: (a). The ratio of their volumes is 2 vols. : 1 vol. → 2 vols.

20 vols. : 10 vols. → 20 vols.

That means, 20 cm3 of hydrogen will combine with 10 cm3 of oxygen to form 20 cm3 of steam.

(b). Oxygen is in excess by 10 cm3.

Answer 2

Gay Lussac's Law of Combining Volumes. Gay Lussac's Law of Combining Volumes states that when gases react, they do so in volumes which bear a simple ratio to one another, and to the volume of the product(s) formed if gaseous, provided the temperature and pressure remain constant.

Examples for Gay-Lussac's Law include systems where a given amount of gas is confined into a closed volume and it is subject to temperature...