WorksheetsHeat and Thermal Energy I
Total questions: 20
Worksheet time: 19mins
If water heats slower than sand, then ----- is said to have a higher specific heat capacity.
Sand
Water
They both have the same specific heat capacity.
Select the state changes that latent heat of fusion applies to.
melting
evaporating
freezing
condensing
sublimation
The diagram shows a heating curve for ice. Which line represents the ice melting?
A
B
C
D
E
Why are lines B and D flat?
The ice is melting
The ice is freezing
All of the thermal energy is used to break the bonds
They stopped the stopwatch
They stopped heating the ice.
This formula is used to find the amount of heat (energy) neccesary when there's a phase change
Q= (h)(ΔT)
Q=(m)(L)
Q=(m)(c)(ΔT)
Q=(k)(A)(dT)
Latent heat is
the heat absorbed or released at a boiling process during a change of phase
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
the heat absorbed or released by an object to increase or decrease its temperature by 1 degree Celcius
How much energy is required to freeze 150 g of water?
[lv=2260000 J kg−1; lf=334000 J kg−1]
50 100 cal
339 000 J
339 000 cal
50 100 J
How much energy is required to change 5 kg of ice at 0 ° C into water at the same temperature? (latent heat of fusion is 3.36 X 106 J/kg )
16.1 X 106 J
16.8 X 106 J
15.1 X 106 cal
16.8 X 106 cal
Consider the following temperature-time graph when a solid is heated. which part of the graph involves latent heat of vaporization?
Part I
Part II
Part III
Part IV
