High School Physics : Enthalpy and Entropy
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Example Questions
Example Question #1 : Understanding Enthalpy
Enthalpy is a measure of __________.
how easily something changes temperature
the conversion of energy to heat
total energy lost in heat transfer
total energy of a thermodynamic system
total work done by a thermodynamic system
total energy of a thermodynamic system
Enthalpy, or 
Example Question #2 : Understanding Enthalpy
An ice cube melts into water. While it is melting, what is the temperature of the mixture doing?
The temperature of the mixture steadily decreases while melting.
The temperature of the mixture steadily increases while melting.
The temperature fluctuates depending upon the point at which you measure it.
The ice part of the mixture is colder than the water part.
It remains constant while melting.
It remains constant while melting.
When an object is changing forms (solid to liquid in this case), the temperature remains constant. All of the energy that would normally go towards changing the internal temperature of the object is going into the latent heat of fusion or enthalpy of fusion instead.
Example Question #1 : Understanding Entropy
Entropy is a measure of __________.
change in heat
specific heat
disorder within the system
energy within the system
temperature
disorder within the system
Entropy is the measurement of disorder within a system, or how far it is from thermal equilibrium. Remember that everything in nature tends towards an equilibrium. The further from that equilibrium something is, the more "disordered" it is when compared to nature's preferred state.
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