3. DID YOU KNOW?
A material may be described by its temperature. Just like length, mass, and time,
temperature is a basic property of matter. Temperature is the measure of average
kinetic energy of the particles in a body. Since according to the kinetic molecular
theory of matter, all particles of any matter are in constant motion, then temperature
is indeed a fundamental quantity of any matter. Hotness and coldness are not very
accurate terms to use in describing temperature. We use units such as Fahrenheit,
Celsius (or Centigrade), or Kelvin to quantify temperature.
4. DID YOU KNOW?
The conversion of Celsius and
Fahrenheit scale depends on the
difference
The Fahrenheit scale, formulated by
Daniel Fahrenheit, was based on his
experiment using a mercuric
thermometer and ice-salt solution. The
Celsius or centigrade scale, was
invented by Anders Celsius using pure
water. Their comparison is seen in
Table 9-1.
5. DID YOU KNOW?
William Thomson, also known as Lord Kelvin, devised the absolute temperature
scale, which was later called the Kelvin scale. His proposal states that the lowest
temperature of zero implies that the particles would stop moving, which is a
contradiction of the kinetic molecular theory. Therefore, it is not right to describe
temperature with negative values. Also, the Kelvin scale does not use degree or (“)
symbol. Celsius and Kelvin scales are related Body through the expression
7. Internal Energy
This is where you section ends. Duplicate this set of slides as many times you need to go over all your sections.
8. A glass of water sits on a table. It may seem that
the glass-water system ha zero energy. But in
the microscopic level, the molecules are
experiencing constant motion or kinetic energy
and attractive forces between molecule called
potential energy. The combination of the motion
and attracti energy of the molecules gives the
internal energy of an object.
10. Our normal body temperature is 37°C. During
summer, when the temperture of the environment
reaches 38.5°C, we feel sweaty and all heated up.
This is because heat transfers from the environment
to our bodies. But causing you to chill.
