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Lost or gained heat in reactions under constant pressure is called enthalpy change.
The total potential as well as kinetic energy of particles of matter is called
enthalpy. It is usually denoted by the letter “H.”
Enthalpy of matters cannot be measured but the change in enthalpy can be
measured.
Consider the following equation:
Reactants Products
→
The molecules in a solid are very close together as
well as very ordered. This means a solid has very low
entropy.
The molecules in a liquid are closer together
compared to gas. They are not as ordered as they are
in a solid. Therefore, a liquid has greater entropy than
solid, but less entropy than a gas.
The molecules of a gas are very far apart and they are
moving randomly. Gases have very high entropy.
Fig. 2.31 Entropy of a solid < entropy of a liquid < entropy of a gas
2 Fundamentals of Physics for Environmental and Medical Professionals
Lost or gained heat in reactions under constant pressure is called enthalpy change.
The total potential as well as kinetic energy of particles of matter is called
enthalpy. It is usually denoted by the letter “H.”
Enthalpy of matters cannot be measured but the change in enthalpy can be
measured.
Consider the following equation:
Reactants Products
→
The molecules in a solid are very close together as
well as very ordered. This means a solid has very low
entropy.
The molecules in a liquid are closer together
compared to gas. They are not as ordered as they are
in a solid. Therefore, a liquid has greater entropy than
solid, but less entropy than a gas.
The molecules of a gas are very far apart and they are
moving randomly. Gases have very high entropy.
Fig. 2.31 Entropy of a solid < entropy of a liquid < entropy of a gas
2 Fundamentals of Physics for Environmental and Medical Professionals