18 flashcards · Shared on 19 August 2026 by AtomAI Library
Flip each card to check yourself.
What is the specific heat capacity of a substance?
The energy needed to raise the temperature of 1 kg of the substance by 1 K
What is the specific heat capacity of a substance?
The energy needed to raise the temperature of 1 kg of the substance by 1 K
Specific latent heat of fusion is the energy required to do what?
Melt 1 kg of a solid without a temperature change
A material has a high specific heat capacity. What does this mean?
It requires a large amount of energy for a given mass and temperature rise
What does specific latent heat describe?
The energy needed to change the state of 1 kg without changing its temperature
Which equation is used to calculate the energy transferred during a change of state?
E = mL
Why does the temperature of a pure substance remain constant while it melts at constant pressure?
The supplied energy changes the particles' arrangement and potential energy rather than their average kinetic energy
On a heating curve, what does a horizontal section usually represent?
A change of state is occurring at constant temperature
A 100 W heater operates for 120 s with no energy losses. How much energy does it transfer?
12,000 J
What is the unit of specific latent heat?
J kg⁻¹
What happens to the internal energy of a substance while it boils, even though its temperature remains constant?
It increases because particle potential energy increases
Which changes of state release energy to the surroundings?
Freezing and condensation
A 0.50 kg block melts completely. Its specific latent heat of fusion is 334,000 J kg⁻¹. How much energy is transferred?
167,000 J
A 100 W heater warms a 2.0 kg block by 10 K in 120 s, with no energy losses. What is the block's specific heat capacity?
600 J kg⁻¹ K⁻¹
Which equation links energy transferred, mass, specific heat capacity and temperature change?
E = mcΔT
What is the SI unit of specific heat capacity?
J kg⁻¹ K⁻¹
How much energy is needed to raise the temperature of 2 kg of water by 5 K if its specific heat capacity is 4200 J kg⁻¹ K⁻¹?
42,000 J
Specific latent heat of vaporisation is the energy required to do what?
Change 1 kg from liquid to gas without a temperature change
How does evaporation differ from boiling?
Evaporation can occur at the surface below the boiling point, while boiling occurs throughout the liquid at its boiling point