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WorksheetsChanging State
Total questions: 12
Worksheet time: 13mins
Breaking bonds is an (a) process where energy is absorbed to separate particles.
When a substance changes state from being more ordered to being more disordered, the bonds between particles are (a)
Name a change of state process that is endothermic
(a)
When a substance becomes more ordered, bonds are formed so energy is (a)
Name a state change that is an exothermic process
(a)
In a heating or cooling curve, flat sections are seen when the particles are changing state because the energy is ..... to change the state and the overall ....... energy of the particles doesn't change during this time.
(a)
When a substance melts, the kinetic energy of the surroundings _____________ and the kinetic energy of the system ______________.
decreases, increases
stays the same
increases, decreases
both decrease
both increase
Is the substance gaining or losing energy?
Gaining
Losing
What state/phase is the object likely to be in from points A to B?
Solid
Liquid
Gas
Plasma
Why does a drink cool when ice is added?
the ice breaks its bonds and adds Ek to the drink causing it to cool
the ice absorbs energy from drink to melt so Ek of drink decreases and cools
The drink releases energy to make bonds for the ice to melt so cools down
