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WorksheetsCHAPTER 20 | The First Law of Thermodynamics 🐣
Total questions: 15
Worksheet time: 11mins
The SI unit of heat and energy is the __________.
BTU
calorie
watt
joule
What is the formula to calculate heat energy required to raise the temperature of any substance?
m = Q.c.p
Q = ½ m. v
Q = m.c.ΔT
m = n.M
What does "ΔT" mean?
A change in temperature
A change in heat
Time
A change in height
For the formula:
Q= m.c.∆T
The units for specific heat are:
kJ/g
J/g°C
J/K
°C
If the specific heat of water is 4,186 J/kg∙°C, how much heat is required to increase the temperature of 1.2 kg of water from 23 °C to 39 °C?
80,3712 J
- 49,478 J
80,3712 K
123,645 °C
One calorie is equal to ...
0.001 kilocalories
the amount of energy required to change the temperature of one gram of water by one degree Celsius.
4.186 Joules
What does m stand for in the equation for specific heat capacity?
Melting point
Miss Grand International
Mass
Measurement
Internal energy is the...
sum of the random distribution of heat and potential energies of the molecules of the system
sum of the kinetic and potential energies of the molecules of an object
sum of the kinetic and potential energies of an object
sum of the random distribution of kinetic and potential energies of the molecules of the system
Does everything have Specific Heat?
Yes
No
Who knows?
The heat absorbed by melting a solid is known as
latent heat of solid
latent heat of fusion
latent heat of liquid
latent heat of vaporisation
latent heat of gas
Latent heat is
the heat absorbed or released by an object to increase or decrease its temperature by 1 degree Celsius
the heat absorbed or released at a constant temperature during a change of phase
the heat absorbed or released at a constant temperature during a change of phase of 1 kg object
What is the meaning of Latent?
1 joule
hidden
kinetic
potential
- 30.0°C
What happens to the temperature of a substance during a phase change?
Increases
Remains constant
Decreases
Increases or Decreases
Select the state changes that latent heat of fusion applies to.
melting
evaporating
freezing
condensing
sublimation
Select the state changes that latent heat of vaporisation applies to.
melting
evaporating
freezing
condensing
sublimation
