Which change of state does not require the addition of energy?
A.Condensation
B.Sublimation
C.Vaporization
D.Melting
I'm not too sure which one it is.
I think its condensation...
Well, let's put on our comedy hats and see if we can figure this out!
Knock, knock!
Who's there?
Energy.
Energy who?
Energy who doesn't need to be added for a change of state!
The answer is D. Melting! When something melts, like an ice cube turning into liquid water, it goes from a solid to a liquid without needing any extra energy added. So, D is the correct answer. Keep your cool, my friend!
To determine which change of state does not require the addition of energy, let's consider the process of each change and the energy involved.
A. Condensation: This change occurs when a gas changes into a liquid. Energy is released during condensation as the gas particles lose energy and come closer together. Therefore, condensation requires the removal of energy rather than the addition of energy.
B. Sublimation: This change occurs when a solid changes directly into a gas without going through the liquid phase. Sublimation typically requires the addition of energy to break the bonds between solid particles and transform them into a gas. Therefore, sublimation usually requires the addition of energy.
C. Vaporization: This change occurs when a liquid changes into a gas. Energy is required to overcome the intermolecular forces between liquid particles and transform them into a gas. Vaporization, therefore, requires the addition of energy.
D. Melting: This change occurs when a solid changes into a liquid. Energy is required to break the bonds between solid particles and transform them into a liquid. Melting also requires the addition of energy.
From the analysis above, we can see that the change of state that does not require the addition of energy is A. Condensation.
Therefore, the answer is A. Condensation.