SSC CGL
Insurance
NABARD
CAPF
RBI Assistant
IBPS PO
SBI PO
Shorts SSC CGL Practice
More Articles
- Behaviour Of Gases
- Introduction - Chemistry
- Atomic Structure: Electron, Proton, Neutron etc.
- Periodic Classification of Elements
- Chemical Bonding
- Oxidation & Reduction
- Acids, Bases & Salts
- Electrolysis
- Carbon and its Compounds
- Fuels
- Metallurgy
- Important Facts about Some Metals
- Non Metal
- Some Important & Common Facts in Chemistry
- Man made substances
Behaviour of Gases
1. Boyle's law:
At constant temperature, the volume of a definite mass of a gas is inversely proportional to pressure.
pV = K (where K is a constant)
p1V1 = p2V2
2. Chrle's law:
At constant pressure, the volume of a definite mass of a gas is directly proportional to absolute temperature.
3. Gay-Lussac's Law:
At constant volume, the pressure of given mass of a gas is directly proportional to the temp in Kelvin.
4. Avugardo's gas law:
At constant temperature and pressure, the volume of a gas is directly proportional to the number of molecules.
5. Ideal gas equation:
pV = nRT is called ideal gas equation. Where
P = Pressure, V = Volume
n = number of mole T = temperature in Kelvin
R = gas constant
= 0.0821 lit atm K–1 mol–1
= 8.314 J K–1 mol–1
= 1.987 cal K–1 mol–1
6. S.T.P. & N.T.P.:
S.T.P. – Sandard temperature and pressure.
N.T.P. – Normal temperature and pressure.
At S.T.P., for 1 mole gas
V = 22.4 litre = 2400 ml
P = 1 atm = 76 cm of Hg = 760 mm of Hg
T = 273 K
Diffusion of gases:
The process of intermixing of gases irrespective or the density relationship and without the effect of external agency is called diffusion of gases.
In a gas, the molecules are far separated and the empty space among the molecules is very large. Therefore the molecules of one gas can move into the empty spaces or voids of the other gas and vice-versa. This leads to diffusion.
Graham's law of diffusion:
Under the similar conditions of temperature and pressure, the rates of diffusion of gases are inversely proportional to the square roots of their densities.
Let r1 and r2 be the rates of diffusion of two gases A and B, d1 and d2 be their respective densities, then according to Graham's law of diffusion.
Since molecular mass = 2 x vapour density.
M = 2 x d
Dalton's law of partial pressure:
It states that – If two or more gases which do not react chemically are enclosed in a vessel, the total pressure of the gaseous mixture is equal to the sum of the partial pressure that each gases which expert pressure when enclosed separately in the same vessel at constant temperature.
Let P1, P2 and P3 be the pressure of three non-reactive gases when enclosed separately. Let total pressure be P then P = P1 + P2 + P3
More Related Articles
Chemistry is the branch of science which deals with the composition of matter and also the Physical and Chemical characteristics associated with the different material objects. A French chemist
by
ExamGuruAtom: The smallest particle of an element is called an atom. An atom can take part in chemical combination and does not occur free in nature. The atom of the hydrogen is the smallest and lighte
Father of periodic table – Mendeleev. The arrangement of the known elements in certain groups in such a way so that the elements with similar properties are grouped together is known as class
The force that holds together the different atoms in a molecule is called chemical bond. There are many types of chemical bond. Ionic bond or (Electrovalent bond): A bond formed by the compl
Oxidation (old concept): Oxidation is a process which involves either of the following – (i) addition of oxygen
Acid: (i) is sour in taste (ii) turns blue litmus paper into red (iii) contains replaceable hydrogen (iv) gives hydrogen ion (H+) in aqueous solution (Arrhenius theorem)
1. Electrolytes: These are the substances which allow the electricity to pass through them in their molten states or in the form of their aqueous solution and undergo chemical decomposition, Ex
Carbon is non-metal having atomic number 6 and mass number 12. It is placed in group (IV) A or group 14 in periodic table. Allotropy The substances which have same chemical properties, but d
A substance that can supple energy either alone or by reacting with another substance is known as fuel. Heat produced by fuel is measured in Calories. An ideal fuel should (i) have high
The process of extracting metal in pure form from its ore is known as metallurgy. Minerals: The compound of a metal found in nature is called a mineral. A mineral may be a single compound or
