Melting points
and boiling
points
Kaluga International School Grade 6/7
Melting and Boiling Points
The melting point is the temperature at which a
solid to a ..............
liquid
substance changes from a ............
The boiling point is the temperature at which a
liquid to a ..............
gas
substance changes from a ............
0 and boils at 100
Water melts at .....°C
...... °C.
Which state?
What is the physical state of water at these
temperatures?
45 °C
liquid
...............
125 °C
gas
...............
-23 °C
solid
...............
75 °C
liquid
...............
Which state?
Think of it like this:
m.p.
solid
(ice)
b.p.
liquid
(water)
0°C
steam
(gas)
100°C
Which state?
What state of matter is water at 56°C?
m.p.
b.p.
56°C
liquid
0°C
100°C
Which state?
What state of matter is water at 125°C?
m.p.
b.p.
125°C
gas
0°C
100°C
Which state?
What state of matter is water at -6°C?
m.p.
b.p.
-6°C
solid
0°C
100°C
Now you try
Here are the melting and boiling points of
some elements. What state are they at 25 °C?
Element
Chlorine
Iodine
Fluorine
Bromine
m.p./°C
b.p./°C
-101
114
-220
-7
-34
184
-188
59
State at
25°C
gas
solid
gas
liquid
In your books
Copy and complete the table to show the state
of these elements at -50°C.
Element
Chlorine
Iodine
Fluorine
Bromine
m.p./°C
b.p./°C
-101
114
-220
-7
-34
184
-188
59
State at
25°C
liquid
solid
gas
solid