2. 1. A piece of iron heated to 150 °C is put into a container filled
with water at 25 °C.
a. What type of energy does the piece of iron transfer to the water?
THERMAL ENERGY
b. What process will occur after the iron has been immersed in the water for a
while?
THERMAL EQUILIBRIUM: the piece of iron transfers heat to water, the heat flow
stops when both substances rise the same temperature
2. Imagine the temperature in New York is 22 °F. What kind of
clothing do people need to wear?
C = (F -32) / 1,8 = (22 – 32) / 1,8 = -10 / 1,8 = -5,5 0 C
CLOTHES: winter clothes: coat, scarf, gloves, hat...
3. 3. The melting and boiling points of ammonia are 195 K and
240 K, respectively. Express each temperature in degrees
Celsius.
195 K
240 K
C = K -273 = 195 -273 = -78 0 C
C = K -273 = 240 -273 = -330 C
4. Put the following temperatures in order from highest to
lowest:
a. 22 0C
b. 200 K
c. 200 0F
22 0 C
C = K -273 = -73 0 C
C = (F – 32) / 1,8 = 93,3 0 C
200 0 F
22 0 C
200 K
4. 5. Which of the following effects is caused by heat?
a.
b.
c.
d.
The volume of a plastic ball increasing when it is exposed to the sun
An iceberg melting
Water evaporating from a glass
An aluminum spoon increasing in length
6. Why is ice cream often available (disponible) in Styrofoam
(poliestireno) containers?
Because Styrofoam is an insulator material that avoids ice cream from melting
7. How much do you know about heat and temperature?
a.
b.
c.
d.
A cold substance gets hotter / colder when it touches a hot substance.
As a substance heats up, its temperature rises / falls.
The boiling point of water is 0 °C / 100 °C.
0 °C on the Celsius scale is the same as 273 K / 0 K on the Kelvin scale.
5. 8. Complete
TEMPERATURE
HEAT
It’s a process
It’s is a measurement
Its key word is “transference”
It’s is a magnitude
It's the transfer of energy from a hot to a cold substance.
It's measured by the Celsius and Kelvin scales
It creates thermal equilibrium
Its instrument is the thermometer
9. Find and write the pairs of words. Match to the definitions
THERMAL ENERGY
THEMAL BALANCE
KINETIC ENERGY
CELSIUS SCALE
KELVIN SCALE
4
3
1
5
2
6. 10. Complete the description of heat and temperature.
HEAT
TEMPERATURES
THERMAL ENERGY
THERMAL BALANCE
TEMPERATURE
RISES
CELSIUS
KELVIN
7. 10. Complete the description of heat and temperature.
HEAT
TEMPERATURES
THERMAL ENERGY
THERMAL BALANCE
TEMPERATURE
RISES
CELSIUS
KELVIN
