## Chemistry Essay

### Essay preview

﻿

CONTENTS OF CHAPTER No. 01

TEMPERATURE
VOLUME
MASS
DENSITY
MOLE
LAW OF DEFINITE PROPORTION
SPECIFIC GRAVITY
GRAM ATOMIC MASS
ELEMENT
TYPES OF ELEMENTS
METALS
NON-METALS
VALENCY
MOLECULE
EMPIRICAL FORMULA

MOLECULAR FORMULA
SYMBOL
FORMULA
COMPOUND
MIXTURE
DIFFERENCE BETWEEN COMPOUND AND MIXTURE

TYPES OF MIXTURE
HOMOGENEOUS MIXTURE
HETEROGENEOUS MIXTURE
MATTER
VARIABLE VALENCY
MOLECULAR MASS
DEFINITION OF CHEMISTRY

Chapter # 01

DEFINITIONS

1. TEMPERATURE

Degree of hotness or coldness of a body is called "TEMPERATURE".    "Temperature is a measure of the intensity of heat".
Temperature is defined as :
"the average kinetic energy of the molecules of a body is called temperature"

SCALES OF TEMPERATURE:

There are three scales s caemperature.
1. Celsius or centigrade scale C.
2. Fahrenheit scale F.
3. Kelvin or Absolute scale K.

CONVERSION

Tk = Tc + 273

C/5 = (F-32) /9

2. VOLUME

Volume is defined as
" The space occupied by a body is called its volume."

SYMBOL

Volume is denoted by "V

UNITS

a) m3
b) dm3
c) cm3
d) mm3
e) Litre
f) Milli litre

3. MASS

The quantity of matter contained in a body is called its "Mass".

SYMBOL

Mass is denoted by "m".

UNITS

a) Kilogram
b) Gram
c) Milligram
d) Microgram

4. DENSITY

Mass per unit volume of a substance is called its "Density".

FORMULA

UNIT

a) Kg / m3
b) gm / cm3
c) gm /litre
d) gm / dm3

5. MOLE

"Atomic mass or formula mass or molecular mass of a
substance expressed in grams is called MOLE".
Or
Mass of a substance contains 6.02 x 1023 atoms or molecules or ions is called "mole"

For example:
1. Atomic mass of carbon = 12 a.m.u.
therefore 12 gram of carbon = one mole of carbon.
2. ...